Write a C++ class Const, Square, Print so that I can write, for example, Cost(5) >> Square() >> Inc() >> Inc() >> Print() and the resulting python program will print 27 to the screen.
Write a C++ class Const, Square, Print so that I can write, for example, Cost(5) >> Square() >> Inc() >> Inc() >> Print() and the resulting python program will print 27 to the screen.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 | #include <iostream> // Base class for chaining operations class Base { public: virtual ~Base() {} // Virtual destructor for proper cleanup // Overload the >> operator for chaining template <typename T> T& operator>>(T& next) { next.Process(*this); return next; } // Pure virtual function for processing data virtual int GetData() const = 0; }; // Class to store a constant value class Const : public Base { private: int value; public: explicit Const(int val) : value(val) {} int GetData() const override { return value; } }; // Class to square the input value class Square : public Base { public: void Process(const Base& prev) { value = prev.GetData() * prev.GetData(); } int GetData() const override { return value; } private: int value; }; // Class to increment the input value class Inc : public Base { public: void Process(const Base& prev) { value = prev.GetData() + 1; } int GetData() const override { return value; } private: int value; }; // Class to print the input value class Print : public Base { public: void Process(const Base& prev) { std::cout << prev.GetData() << std::endl; } int GetData() const override { return 0; } // Dummy return value }; int main() { Const(5) >> Square() >> Inc() >> Inc() >> Print(); // Output: 27 return 0; } |
1 | Const(5) >> Square() >> Inc() >> Inc() >> Print(); |
I extracted the following code from that output:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 | #include <iostream> // Base class for chaining operations class Base { public: virtual ~Base() {} // Virtual destructor for proper cleanup // Overload the >> operator for chaining template <typename T> T& operator>>(T& next) { next.Process(*this); return next; } // Pure virtual function for processing data virtual int GetData() const = 0; }; // Class to store a constant value class Const : public Base { private: int value; public: explicit Const(int val) : value(val) {} int GetData() const override { return value; } }; // Class to square the input value class Square : public Base { public: void Process(const Base& prev) { value = prev.GetData() * prev.GetData(); } int GetData() const override { return value; } private: int value; }; // Class to increment the input value class Inc : public Base { public: void Process(const Base& prev) { value = prev.GetData() + 1; } int GetData() const override { return value; } private: int value; }; // Class to print the input value class Print : public Base { public: void Process(const Base& prev) { std::cout << prev.GetData() << std::endl; } int GetData() const override { return 0; } // Dummy return value }; |
Running the following program:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 | #include <iostream> // Base class for chaining operations class Base { public: virtual ~Base() {} // Virtual destructor for proper cleanup // Overload the >> operator for chaining template <typename T> T& operator>>(T& next) { next.Process(*this); return next; } // Pure virtual function for processing data virtual int GetData() const = 0; }; // Class to store a constant value class Const : public Base { private: int value; public: explicit Const(int val) : value(val) {} int GetData() const override { return value; } }; // Class to square the input value class Square : public Base { public: void Process(const Base& prev) { value = prev.GetData() * prev.GetData(); } int GetData() const override { return value; } private: int value; }; // Class to increment the input value class Inc : public Base { public: void Process(const Base& prev) { value = prev.GetData() + 1; } int GetData() const override { return value; } private: int value; }; // Class to print the input value class Print : public Base { public: void Process(const Base& prev) { std::cout << prev.GetData() << std::endl; } int GetData() const override { return 0; } // Dummy return value }; int main() { Const(2) >> Square() >> Inc() >> Square() >> Square() >> Print(); return 0; } |
main.cpp: In function 'int main()':
main.cpp:70:13: error: cannot bind non-const lvalue reference of type 'Square&' to an rvalue of type 'Square'
70 | Const(2) >> Square() >> Inc() >> Square() >> Square() >> Print();
| ^~~~~~~~
main.cpp:11:20: note: initializing argument 1 of 'T& Base::operator>>(T&) [with T = Square]'
11 | T& operator>>(T& next) {
| ~~~^~~~
main.sh: line 2: ./a.out: No such file or directory
Testing if the previous output contains the string 625
: False
Write a C++ class Const, Square, Print so that I can write, for example, Cost(5) >> Square() >> Inc() >> Inc() >> Print() and the resulting python program will print 27 to the screen.
Write a C++ class Const, Square, Print so that I can write, for example, Cost(5) >> Square() >> Inc() >> Inc() >> Print() and the resulting python program will print 27 to the screen.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 | #include <iostream> // Base class for chaining class Base { public: virtual ~Base() {} virtual Base& operator>>(Base& other) { return other; } }; // Const class: Holds a constant value class Const : public Base { public: Const(int val) : value(val) {} int getValue() const { return value; } private: int value; }; // Square class: Squares the input value class Square : public Base { public: Square() {} Base& operator>>(Base& other) override { if (auto* next = dynamic_cast<Const*>(&other)) { next->value *= next->value; } return other; } }; // Inc class: Increments the input value class Inc : public Base { public: Inc() {} Base& operator>>(Base& other) override { if (auto* next = dynamic_cast<Const*>(&other)) { ++next->value; } return other; } }; // Print class: Prints the input value to the console class Print : public Base { public: Print() {} Base& operator>>(Base& other) override { if (auto* prev = dynamic_cast<Const*>(&other)) { std::cout << prev->getValue() << std::endl; } return other; } }; |
1 2 3 4 5 | int main() { Const(5) >> Square() >> Inc() >> Inc() >> Print(); // Output: 27 return 0; } |
I extracted the following code from that output:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 | #include <iostream> // Base class for chaining class Base { public: virtual ~Base() {} virtual Base& operator>>(Base& other) { return other; } }; // Const class: Holds a constant value class Const : public Base { public: Const(int val) : value(val) {} int getValue() const { return value; } private: int value; }; // Square class: Squares the input value class Square : public Base { public: Square() {} Base& operator>>(Base& other) override { if (auto* next = dynamic_cast<Const*>(&other)) { next->value *= next->value; } return other; } }; // Inc class: Increments the input value class Inc : public Base { public: Inc() {} Base& operator>>(Base& other) override { if (auto* next = dynamic_cast<Const*>(&other)) { ++next->value; } return other; } }; // Print class: Prints the input value to the console class Print : public Base { public: Print() {} Base& operator>>(Base& other) override { if (auto* prev = dynamic_cast<Const*>(&other)) { std::cout << prev->getValue() << std::endl; } return other; } }; |
Running the following program:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 | #include <iostream> // Base class for chaining class Base { public: virtual ~Base() {} virtual Base& operator>>(Base& other) { return other; } }; // Const class: Holds a constant value class Const : public Base { public: Const(int val) : value(val) {} int getValue() const { return value; } private: int value; }; // Square class: Squares the input value class Square : public Base { public: Square() {} Base& operator>>(Base& other) override { if (auto* next = dynamic_cast<Const*>(&other)) { next->value *= next->value; } return other; } }; // Inc class: Increments the input value class Inc : public Base { public: Inc() {} Base& operator>>(Base& other) override { if (auto* next = dynamic_cast<Const*>(&other)) { ++next->value; } return other; } }; // Print class: Prints the input value to the console class Print : public Base { public: Print() {} Base& operator>>(Base& other) override { if (auto* prev = dynamic_cast<Const*>(&other)) { std::cout << prev->getValue() << std::endl; } return other; } }; int main() { Const(2) >> Square() >> Inc() >> Square() >> Square() >> Print(); return 0; } |
main.cpp: In member function 'virtual Base& Square::operator>>(Base&)':
main.cpp:31:13: error: 'int Const::value' is private within this context
31 | next->value *= next->value;
| ^~~~~
main.cpp:21:7: note: declared private here
21 | int value;
| ^~~~~
main.cpp:31:13: note: field 'int Const::value' can be accessed via 'int Const::getValue() const'
31 | next->value *= next->value;
| ^~~~~
| getValue()
main.cpp:31:28: error: 'int Const::value' is private within this context
31 | next->value *= next->value;
| ^~~~~
main.cpp:21:7: note: declared private here
21 | int value;
| ^~~~~
main.cpp:31:28: note: field 'int Const::value' can be accessed via 'int Const::getValue() const'
31 | next->value *= next->value;
| ^~~~~
| getValue()
main.cpp: In member function 'virtual Base& Inc::operator>>(Base&)':
main.cpp:44:15: error: 'int Const::value' is private within this context
44 | ++next->value;
| ^~~~~
main.cpp:21:7: note: declared private here
21 | int value;
| ^~~~~
main.cpp:44:15: note: field 'int Const::value' can be accessed via 'int Const::getValue() const'
44 | ++next->value;
| ^~~~~
| getValue()
main.cpp: In function 'int main()':
main.cpp:66:13: error: cannot bind non-const lvalue reference of type 'Base&' to an rvalue of type 'Base'
66 | Const(2) >> Square() >> Inc() >> Square() >> Square() >> Print();
| ^~~~~~~~
main.cpp:8:34: note: initializing argument 1 of 'virtual Base& Base::operator>>(Base&)'
8 | virtual Base& operator>>(Base& other) {
| ~~~~~~^~~~~
main.sh: line 2: ./a.out: No such file or directory
Testing if the previous output contains the string 625
: False
Write a C++ class Const, Square, Print so that I can write, for example, Cost(5) >> Square() >> Inc() >> Inc() >> Print() and the resulting python program will print 27 to the screen.
Write a C++ class Const, Square, Print so that I can write, for example, Cost(5) >> Square() >> Inc() >> Inc() >> Print() and the resulting python program will print 27 to the screen.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 | #include <iostream> // Forward declaration for chaining template <typename T> class Square; template <typename T> class Inc; template <typename T> class Print; // Const class to hold a constant value template <typename T> class Const { public: Const(const T& value) : value_(value) {} // Overloaded >> operator for chaining with Square Square<T> operator>>(Square<T>&& other) { return Square<T>(value_); } // Overloaded >> operator for chaining with Inc Inc<T> operator>>(Inc<T>&& other) { return Inc<T>(value_); } // Overloaded >> operator for chaining with Print Print<T> operator>>(Print<T>&& other) { return Print<T>(value_); } private: T value_; }; // Square class to square the input value template <typename T> class Square { public: Square(const T& value) : value_(value) {} // Overloaded >> operator for chaining with Inc Inc<T> operator>>(Inc<T>&& other) { return Inc<T>(value_ * value_); } // Overloaded >> operator for chaining with Print Print<T> operator>>(Print<T>&& other) { return Print<T>(value_ * value_); } private: T value_; }; // Inc class to increment the input value template <typename T> class Inc { public: Inc(const T& value) : value_(value) {} // Overloaded >> operator for chaining with Inc Inc<T> operator>>(Inc<T>&& other) { return Inc<T>(value_ + 1); } // Overloaded >> operator for chaining with Print Print<T> operator>>(Print<T>&& other) { return Print<T>(value_ + 1); } private: T value_; }; // Print class to print the input value template <typename T> class Print { public: Print(const T& value) : value_(value) {} // Overloaded >> operator for chaining (no-op) Print<T> operator>>(Print<T>&& other) { return Print<T>(value_); } // Function to print the value void print() { std::cout << value_ << std::endl; } private: T value_; }; int main() { // Example usage: Const(5) >> Square() >> Inc() >> Inc() >> Print().print(); // Outputs 27 return 0; } |
I extracted the following code from that output:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 | #include <iostream> // Forward declaration for chaining template <typename T> class Square; template <typename T> class Inc; template <typename T> class Print; // Const class to hold a constant value template <typename T> class Const { public: Const(const T& value) : value_(value) {} // Overloaded >> operator for chaining with Square Square<T> operator>>(Square<T>&& other) { return Square<T>(value_); } // Overloaded >> operator for chaining with Inc Inc<T> operator>>(Inc<T>&& other) { return Inc<T>(value_); } // Overloaded >> operator for chaining with Print Print<T> operator>>(Print<T>&& other) { return Print<T>(value_); } private: T value_; }; // Square class to square the input value template <typename T> class Square { public: Square(const T& value) : value_(value) {} // Overloaded >> operator for chaining with Inc Inc<T> operator>>(Inc<T>&& other) { return Inc<T>(value_ * value_); } // Overloaded >> operator for chaining with Print Print<T> operator>>(Print<T>&& other) { return Print<T>(value_ * value_); } private: T value_; }; // Inc class to increment the input value template <typename T> class Inc { public: Inc(const T& value) : value_(value) {} // Overloaded >> operator for chaining with Inc Inc<T> operator>>(Inc<T>&& other) { return Inc<T>(value_ + 1); } // Overloaded >> operator for chaining with Print Print<T> operator>>(Print<T>&& other) { return Print<T>(value_ + 1); } private: T value_; }; // Print class to print the input value template <typename T> class Print { public: Print(const T& value) : value_(value) {} // Overloaded >> operator for chaining (no-op) Print<T> operator>>(Print<T>&& other) { return Print<T>(value_); } // Function to print the value void print() { std::cout << value_ << std::endl; } private: T value_; }; int main() { // Example usage: Const(5) >> Square() >> Inc() >> Inc() >> Print().print(); // Outputs 27 return 0; } |
Running the following program:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 | #include <iostream> // Forward declaration for chaining template <typename T> class Square; template <typename T> class Inc; template <typename T> class Print; // Const class to hold a constant value template <typename T> class Const { public: Const(const T& value) : value_(value) {} // Overloaded >> operator for chaining with Square Square<T> operator>>(Square<T>&& other) { return Square<T>(value_); } // Overloaded >> operator for chaining with Inc Inc<T> operator>>(Inc<T>&& other) { return Inc<T>(value_); } // Overloaded >> operator for chaining with Print Print<T> operator>>(Print<T>&& other) { return Print<T>(value_); } private: T value_; }; // Square class to square the input value template <typename T> class Square { public: Square(const T& value) : value_(value) {} // Overloaded >> operator for chaining with Inc Inc<T> operator>>(Inc<T>&& other) { return Inc<T>(value_ * value_); } // Overloaded >> operator for chaining with Print Print<T> operator>>(Print<T>&& other) { return Print<T>(value_ * value_); } private: T value_; }; // Inc class to increment the input value template <typename T> class Inc { public: Inc(const T& value) : value_(value) {} // Overloaded >> operator for chaining with Inc Inc<T> operator>>(Inc<T>&& other) { return Inc<T>(value_ + 1); } // Overloaded >> operator for chaining with Print Print<T> operator>>(Print<T>&& other) { return Print<T>(value_ + 1); } private: T value_; }; // Print class to print the input value template <typename T> class Print { public: Print(const T& value) : value_(value) {} // Overloaded >> operator for chaining (no-op) Print<T> operator>>(Print<T>&& other) { return Print<T>(value_); } // Function to print the value void print() { std::cout << value_ << std::endl; } private: T value_; }; int __delete_this__main() { // Example usage: Const(5) >> Square() >> Inc() >> Inc() >> Print().print(); // Outputs 27 return 0; } int main() { Const(2) >> Square() >> Inc() >> Square() >> Square() >> Print(); return 0; } |
main.cpp: In function 'int __delete_this__main()':
main.cpp:101:22: error: class template argument deduction failed:
101 | Const(5) >> Square() >> Inc() >> Inc() >> Print().print(); // Outputs 27
| ^
main.cpp:101:22: error: no matching function for call to 'Square()'
main.cpp:43:3: note: candidate: 'template<class T> Square(const T&)-> Square<T>'
43 | Square(const T& value) : value_(value) {}
| ^~~~~~
main.cpp:43:3: note: template argument deduction/substitution failed:
main.cpp:101:22: note: candidate expects 1 argument, 0 provided
101 | Const(5) >> Square() >> Inc() >> Inc() >> Print().print(); // Outputs 27
| ^
main.cpp:6:7: note: candidate: 'template<class T> Square(Square<T>)-> Square<T>'
6 | class Square;
| ^~~~~~
main.cpp:6:7: note: template argument deduction/substitution failed:
main.cpp:101:22: note: candidate expects 1 argument, 0 provided
101 | Const(5) >> Square() >> Inc() >> Inc() >> Print().print(); // Outputs 27
| ^
main.cpp:101:31: error: class template argument deduction failed:
101 | Const(5) >> Square() >> Inc() >> Inc() >> Print().print(); // Outputs 27
| ^
main.cpp:101:31: error: no matching function for call to 'Inc()'
main.cpp:63:3: note: candidate: 'template<class T> Inc(const T&)-> Inc<T>'
63 | Inc(const T& value) : value_(value) {}
| ^~~
main.cpp:63:3: note: template argument deduction/substitution failed:
main.cpp:101:31: note: candidate expects 1 argument, 0 provided
101 | Const(5) >> Square() >> Inc() >> Inc() >> Print().print(); // Outputs 27
| ^
main.cpp:9:7: note: candidate: 'template<class T> Inc(Inc<T>)-> Inc<T>'
9 | class Inc;
| ^~~
main.cpp:9:7: note: template argument deduction/substitution failed:
main.cpp:101:31: note: candidate expects 1 argument, 0 provided
101 | Const(5) >> Square() >> Inc() >> Inc() >> Print().print(); // Outputs 27
| ^
main.cpp:101:40: error: class template argument deduction failed:
101 | Const(5) >> Square() >> Inc() >> Inc() >> Print().print(); // Outputs 27
| ^
main.cpp:101:40: error: no matching function for call to 'Inc()'
main.cpp:63:3: note: candidate: 'template<class T> Inc(const T&)-> Inc<T>'
63 | Inc(const T& value) : value_(value) {}
| ^~~
main.cpp:63:3: note: template argument deduction/substitution failed:
main.cpp:101:40: note: candidate expects 1 argument, 0 provided
101 | Const(5) >> Square() >> Inc() >> Inc() >> Print().print(); // Outputs 27
| ^
main.cpp:9:7: note: candidate: 'template<class T> Inc(Inc<T>)-> Inc<T>'
9 | class Inc;
| ^~~
main.cpp:9:7: note: template argument deduction/substitution failed:
main.cpp:101:40: note: candidate expects 1 argument, 0 provided
101 | Const(5) >> Square() >> Inc() >> Inc() >> Print().print(); // Outputs 27
| ^
main.cpp:101:51: error: class template argument deduction failed:
101 | Const(5) >> Square() >> Inc() >> Inc() >> Print().print(); // Outputs 27
| ^
main.cpp:101:51: error: no matching function for call to 'Print()'
main.cpp:83:3: note: candidate: 'template<class T> Print(const T&)-> Print<T>'
83 | Print(const T& value) : value_(value) {}
| ^~~~~
main.cpp:83:3: note: template argument deduction/substitution failed:
main.cpp:101:51: note: candidate expects 1 argument, 0 provided
101 | Const(5) >> Square() >> Inc() >> Inc() >> Print().print(); // Outputs 27
| ^
main.cpp:12:7: note: candidate: 'template<class T> Print(Print<T>)-> Print<T>'
12 | class Print;
| ^~~~~
main.cpp:12:7: note: template argument deduction/substitution failed:
main.cpp:101:51: note: candidate expects 1 argument, 0 provided
101 | Const(5) >> Square() >> Inc() >> Inc() >> Print().print(); // Outputs 27
| ^
main.cpp: In function 'int main()':
main.cpp:109:20: error: class template argument deduction failed:
109 | Const(2) >> Square() >> Inc() >> Square() >> Square() >> Print();
| ^
main.cpp:109:20: error: no matching function for call to 'Square()'
main.cpp:43:3: note: candidate: 'template<class T> Square(const T&)-> Square<T>'
43 | Square(const T& value) : value_(value) {}
| ^~~~~~
main.cpp:43:3: note: template argument deduction/substitution failed:
main.cpp:109:20: note: candidate expects 1 argument, 0 provided
109 | Const(2) >> Square() >> Inc() >> Square() >> Square() >> Print();
| ^
main.cpp:6:7: note: candidate: 'template<class T> Square(Square<T>)-> Square<T>'
6 | class Square;
| ^~~~~~
main.cpp:6:7: note: template argument deduction/substitution failed:
main.cpp:109:20: note: candidate expects 1 argument, 0 provided
109 | Const(2) >> Square() >> Inc() >> Square() >> Square() >> Print();
| ^
main.cpp:109:29: error: class template argument deduction failed:
109 | Const(2) >> Square() >> Inc() >> Square() >> Square() >> Print();
| ^
main.cpp:109:29: error: no matching function for call to 'Inc()'
main.cpp:63:3: note: candidate: 'template<class T> Inc(const T&)-> Inc<T>'
63 | Inc(const T& value) : value_(value) {}
| ^~~
main.cpp:63:3: note: template argument deduction/substitution failed:
main.cpp:109:29: note: candidate expects 1 argument, 0 provided
109 | Const(2) >> Square() >> Inc() >> Square() >> Square() >> Print();
| ^
main.cpp:9:7: note: candidate: 'template<class T> Inc(Inc<T>)-> Inc<T>'
9 | class Inc;
| ^~~
main.cpp:9:7: note: template argument deduction/substitution failed:
main.cpp:109:29: note: candidate expects 1 argument, 0 provided
109 | Const(2) >> Square() >> Inc() >> Square() >> Square() >> Print();
| ^
main.cpp:109:41: error: class template argument deduction failed:
109 | Const(2) >> Square() >> Inc() >> Square() >> Square() >> Print();
| ^
main.cpp:109:41: error: no matching function for call to 'Square()'
main.cpp:43:3: note: candidate: 'template<class T> Square(const T&)-> Square<T>'
43 | Square(const T& value) : value_(value) {}
| ^~~~~~
main.cpp:43:3: note: template argument deduction/substitution failed:
main.cpp:109:41: note: candidate expects 1 argument, 0 provided
109 | Const(2) >> Square() >> Inc() >> Square() >> Square() >> Print();
| ^
main.cpp:6:7: note: candidate: 'template<class T> Square(Square<T>)-> Square<T>'
6 | class Square;
| ^~~~~~
main.cpp:6:7: note: template argument deduction/substitution failed:
main.cpp:109:41: note: candidate expects 1 argument, 0 provided
109 | Const(2) >> Square() >> Inc() >> Square() >> Square() >> Print();
| ^
main.cpp:109:53: error: class template argument deduction failed:
109 | Const(2) >> Square() >> Inc() >> Square() >> Square() >> Print();
| ^
main.cpp:109:53: error: no matching function for call to 'Square()'
main.cpp:43:3: note: candidate: 'template<class T> Square(const T&)-> Square<T>'
43 | Square(const T& value) : value_(value) {}
| ^~~~~~
main.cpp:43:3: note: template argument deduction/substitution failed:
main.cpp:109:53: note: candidate expects 1 argument, 0 provided
109 | Const(2) >> Square() >> Inc() >> Square() >> Square() >> Print();
| ^
main.cpp:6:7: note: candidate: 'template<class T> Square(Square<T>)-> Square<T>'
6 | class Square;
| ^~~~~~
main.cpp:6:7: note: template argument deduction/substitution failed:
main.cpp:109:53: note: candidate expects 1 argument, 0 provided
109 | Const(2) >> Square() >> Inc() >> Square() >> Square() >> Print();
| ^
main.cpp:109:64: error: class template argument deduction failed:
109 | Const(2) >> Square() >> Inc() >> Square() >> Square() >> Print();
| ^
main.cpp:109:64: error: no matching function for call to 'Print()'
main.cpp:83:3: note: candidate: 'template<class T> Print(const T&)-> Print<T>'
83 | Print(const T& value) : value_(value) {}
| ^~~~~
main.cpp:83:3: note: template argument deduction/substitution failed:
main.cpp:109:64: note: candidate expects 1 argument, 0 provided
109 | Const(2) >> Square() >> Inc() >> Square() >> Square() >> Print();
| ^
main.cpp:12:7: note: candidate: 'template<class T> Print(Print<T>)-> Print<T>'
12 | class Print;
| ^~~~~
main.cpp:12:7: note: template argument deduction/substitution failed:
main.cpp:109:64: note: candidate expects 1 argument, 0 provided
109 | Const(2) >> Square() >> Inc() >> Square() >> Square() >> Print();
| ^
main.sh: line 2: ./a.out: No such file or directory
Testing if the previous output contains the string 625
: False
Write a C++ class Const, Square, Print so that I can write, for example, Cost(5) >> Square() >> Inc() >> Inc() >> Print() and the resulting python program will print 27 to the screen.
Write a C++ class Const, Square, Print so that I can write, for example, Cost(5) >> Square() >> Inc() >> Inc() >> Print() and the resulting python program will print 27 to the screen.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 | #include <iostream> // Base class for function objects class FunctionObject { public: virtual int operator()(int value) const = 0; }; // Const function object class Const : public FunctionObject { private: int value; public: Const(int value) : value(value) {} int operator()(int) const override { return value; } // Overloading >> operator to chain function objects template <typename T> T operator>>(T next) const { return next; } }; // Square function object class Square : public FunctionObject { public: int operator()(int value) const override { return value * value; } // Overloading >> operator to chain function objects template <typename T> T operator>>(T next) const { return next; } }; // Inc function object (increment by 1) class Inc : public FunctionObject { public: int operator()(int value) const override { return value + 1; } // Overloading >> operator to chain function objects template <typename T> T operator>>(T next) const { return next; } }; // Print function object class Print : public FunctionObject { public: int operator()(int value) const override { std::cout << value << std::endl; return value; } }; int main() { // Example usage: Const(5) >> Square() >> Inc() >> Inc() >> Print(); return 0; } |
I extracted the following code from that output:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 | #include <iostream> // Base class for function objects class FunctionObject { public: virtual int operator()(int value) const = 0; }; // Const function object class Const : public FunctionObject { private: int value; public: Const(int value) : value(value) {} int operator()(int) const override { return value; } // Overloading >> operator to chain function objects template <typename T> T operator>>(T next) const { return next; } }; // Square function object class Square : public FunctionObject { public: int operator()(int value) const override { return value * value; } // Overloading >> operator to chain function objects template <typename T> T operator>>(T next) const { return next; } }; // Inc function object (increment by 1) class Inc : public FunctionObject { public: int operator()(int value) const override { return value + 1; } // Overloading >> operator to chain function objects template <typename T> T operator>>(T next) const { return next; } }; // Print function object class Print : public FunctionObject { public: int operator()(int value) const override { std::cout << value << std::endl; return value; } }; int main() { // Example usage: Const(5) >> Square() >> Inc() >> Inc() >> Print(); return 0; } |
Running the following program:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 | #include <iostream> // Base class for function objects class FunctionObject { public: virtual int operator()(int value) const = 0; }; // Const function object class Const : public FunctionObject { private: int value; public: Const(int value) : value(value) {} int operator()(int) const override { return value; } // Overloading >> operator to chain function objects template <typename T> T operator>>(T next) const { return next; } }; // Square function object class Square : public FunctionObject { public: int operator()(int value) const override { return value * value; } // Overloading >> operator to chain function objects template <typename T> T operator>>(T next) const { return next; } }; // Inc function object (increment by 1) class Inc : public FunctionObject { public: int operator()(int value) const override { return value + 1; } // Overloading >> operator to chain function objects template <typename T> T operator>>(T next) const { return next; } }; // Print function object class Print : public FunctionObject { public: int operator()(int value) const override { std::cout << value << std::endl; return value; } }; int __delete_this__main() { // Example usage: Const(5) >> Square() >> Inc() >> Inc() >> Print(); return 0; } int main() { Const(2) >> Square() >> Inc() >> Square() >> Square() >> Print(); return 0; } |
Testing if the previous output contains the string 625
: False
Write a C++ class Const, Square, Print so that I can write, for example, Cost(5) >> Square() >> Inc() >> Inc() >> Print() and the resulting python program will print 27 to the screen.
Write a C++ class Const, Square, Print so that I can write, for example, Cost(5) >> Square() >> Inc() >> Inc() >> Print() and the resulting python program will print 27 to the screen.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 | #include <iostream> // Base class for function objects class FunctionObject { public: virtual int operator()(int value) const = 0; }; // Const class to set an initial value class Const : public FunctionObject { private: int value; public: explicit Const(int val) : value(val) {} int operator()(int) const override { return value; } }; // Square class to square the input value class Square : public FunctionObject { public: int operator()(int value) const override { return value * value; } }; // Inc class to increment the input value class Inc : public FunctionObject { public: int operator()(int value) const override { return value + 1; } }; // Print class to print the input value class Print : public FunctionObject { public: int operator()(int value) const override { std::cout << value << std::endl; return value; // Return the value for potential chaining } }; // Overloaded >> operator to chain function objects template<typename T, typename U> auto operator>>(const T& lhs, const U& rhs) { return [=](int value) { return rhs(lhs(value)); }; } int main() { // Create instances of the function objects Const const5(5); Square square; Inc inc; Print print; // Chain the function objects and execute (const5 >> square >> inc >> inc >> print)(0); return 0; } |
I extracted the following code from that output:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 | #include <iostream> // Base class for function objects class FunctionObject { public: virtual int operator()(int value) const = 0; }; // Const class to set an initial value class Const : public FunctionObject { private: int value; public: explicit Const(int val) : value(val) {} int operator()(int) const override { return value; } }; // Square class to square the input value class Square : public FunctionObject { public: int operator()(int value) const override { return value * value; } }; // Inc class to increment the input value class Inc : public FunctionObject { public: int operator()(int value) const override { return value + 1; } }; // Print class to print the input value class Print : public FunctionObject { public: int operator()(int value) const override { std::cout << value << std::endl; return value; // Return the value for potential chaining } }; // Overloaded >> operator to chain function objects template<typename T, typename U> auto operator>>(const T& lhs, const U& rhs) { return [=](int value) { return rhs(lhs(value)); }; } int main() { // Create instances of the function objects Const const5(5); Square square; Inc inc; Print print; // Chain the function objects and execute (const5 >> square >> inc >> inc >> print)(0); return 0; } |
Running the following program:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 | #include <iostream> // Base class for function objects class FunctionObject { public: virtual int operator()(int value) const = 0; }; // Const class to set an initial value class Const : public FunctionObject { private: int value; public: explicit Const(int val) : value(val) {} int operator()(int) const override { return value; } }; // Square class to square the input value class Square : public FunctionObject { public: int operator()(int value) const override { return value * value; } }; // Inc class to increment the input value class Inc : public FunctionObject { public: int operator()(int value) const override { return value + 1; } }; // Print class to print the input value class Print : public FunctionObject { public: int operator()(int value) const override { std::cout << value << std::endl; return value; // Return the value for potential chaining } }; // Overloaded >> operator to chain function objects template<typename T, typename U> auto operator>>(const T& lhs, const U& rhs) { return [=](int value) { return rhs(lhs(value)); }; } int __delete_this__main() { // Create instances of the function objects Const const5(5); Square square; Inc inc; Print print; // Chain the function objects and execute (const5 >> square >> inc >> inc >> print)(0); return 0; } int main() { Const(2) >> Square() >> Inc() >> Square() >> Square() >> Print(); return 0; } |
Testing if the previous output contains the string 625
: False