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.
# C++ Function Pipeline Classes Here's a C++ implementation that allows you to chain operations using the `>>` operator to process values:
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 to represent a value class Value { protected: int value_; public: Value(int value) : value_(value) {} int get() const { return value_; } }; // Const class to initialize with a constant value class Const : public Value { public: Const(int value) : Value(value) {} template <typename Op> auto operator>>(const Op& op) const { return op.apply(value_); } }; // Square operation class Square { public: Value apply(int value) const { return Value(value * value); } template <typename Op> auto operator>>(const Op& op) const { return op; } }; // Increment operation class Inc { public: Value apply(int value) const { return Value(value + 1); } template <typename Op> auto operator>>(const Op& op) const { return op; } }; // Print operation class Print { public: Value apply(int value) const { std::cout << value << std::endl; return Value(value); } template <typename Op> auto operator>>(const Op& op) const { return op; } }; int main() { 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 to represent a value class Value { protected: int value_; public: Value(int value) : value_(value) {} int get() const { return value_; } }; // Const class to initialize with a constant value class Const : public Value { public: Const(int value) : Value(value) {} template <typename Op> auto operator>>(const Op& op) const { return op.apply(value_); } }; // Square operation class Square { public: Value apply(int value) const { return Value(value * value); } template <typename Op> auto operator>>(const Op& op) const { return op; } }; // Increment operation class Inc { public: Value apply(int value) const { return Value(value + 1); } template <typename Op> auto operator>>(const Op& op) const { return op; } }; // Print operation class Print { public: Value apply(int value) const { std::cout << value << std::endl; return Value(value); } template <typename Op> auto operator>>(const Op& op) const { return op; } }; int main() { 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 to represent a value class Value { protected: int value_; public: Value(int value) : value_(value) {} int get() const { return value_; } }; // Const class to initialize with a constant value class Const : public Value { public: Const(int value) : Value(value) {} template <typename Op> auto operator>>(const Op& op) const { return op.apply(value_); } }; // Square operation class Square { public: Value apply(int value) const { return Value(value * value); } template <typename Op> auto operator>>(const Op& op) const { return op; } }; // Increment operation class Inc { public: Value apply(int value) const { return Value(value + 1); } template <typename Op> auto operator>>(const Op& op) const { return op; } }; // Print operation class Print { public: Value apply(int value) const { std::cout << value << std::endl; return Value(value); } template <typename Op> auto operator>>(const Op& op) const { return op; } }; int __delete_this__main() { Const(5) >> Square() >> Inc() >> Inc() >> Print(); return 0; } int main() { Const(2) >> Square() >> Inc() >> Square() >> Square() >> Print(); return 0; } |
main.cpp: In function 'int __delete_this__main()':
main.cpp:69:26: error: no match for 'operator>>' (operand types are 'Value' and 'Inc')
69 | Const(5) >> Square() >> Inc() >> Inc() >> Print();
| ~~~~~~~~~~~~~~~~~~~~ ^~ ~~~~~
| | |
| Value Inc
main.cpp: In function 'int main()':
main.cpp:76:22: error: no match for 'operator>>' (operand types are 'Value' and 'Inc')
76 | Const(2) >> Square() >> Inc() >> Square() >> Square() >> Print();
| ~~~~~~~~~~~~~~~~~~~~ ^~ ~~~~~
| | |
| Value Inc
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.
# C++ Chain Processing Classes Implementation Here's a C++ implementation of the requested classes that allows for method chaining with the `>>` operator:
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 | #include <iostream> // Forward declarations to allow for operator>> overloading class Square; class Inc; class Print; // Value class to pass data through the chain class Value { public: int data; Value(int val) : data(val) {} Value operator>>(const Square& op) const; Value operator>>(const Inc& op) const; Value operator>>(const Print& op) const; }; // Const class that initializes a value class Const { private: int value; public: Const(int val) : value(val) {} // Allows Const to be the first element in the chain Value operator>>(const Square& op) const; Value operator>>(const Inc& op) const; Value operator>>(const Print& op) const; }; // Square class that squares the input value class Square { public: int apply(int val) const { return val * val; } }; // Inc class that increments the input value class Inc { public: int apply(int val) const { return val + 1; } }; // Print class that outputs the current value class Print { public: int apply(int val) const { std::cout << val << std::endl; return val; } }; // Operator implementations for Value class Value Value::operator>>(const Square& op) const { return Value(op.apply(data)); } Value Value::operator>>(const Inc& op) const { return Value(op.apply(data)); } Value Value::operator>>(const Print& op) const { return Value(op.apply(data)); } // Operator implementations for Const class Value Const::operator>>(const Square& op) const { return Value(value) >> op; } Value Const::operator>>(const Inc& op) const { return Value(value) >> op; } Value Const::operator>>(const Print& op) const { return Value(value) >> op; } int main() { // Example usage: 5² = 25, then +1 = 26, then +1 = 27, then print 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 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 | #include <iostream> // Forward declarations to allow for operator>> overloading class Square; class Inc; class Print; // Value class to pass data through the chain class Value { public: int data; Value(int val) : data(val) {} Value operator>>(const Square& op) const; Value operator>>(const Inc& op) const; Value operator>>(const Print& op) const; }; // Const class that initializes a value class Const { private: int value; public: Const(int val) : value(val) {} // Allows Const to be the first element in the chain Value operator>>(const Square& op) const; Value operator>>(const Inc& op) const; Value operator>>(const Print& op) const; }; // Square class that squares the input value class Square { public: int apply(int val) const { return val * val; } }; // Inc class that increments the input value class Inc { public: int apply(int val) const { return val + 1; } }; // Print class that outputs the current value class Print { public: int apply(int val) const { std::cout << val << std::endl; return val; } }; // Operator implementations for Value class Value Value::operator>>(const Square& op) const { return Value(op.apply(data)); } Value Value::operator>>(const Inc& op) const { return Value(op.apply(data)); } Value Value::operator>>(const Print& op) const { return Value(op.apply(data)); } // Operator implementations for Const class Value Const::operator>>(const Square& op) const { return Value(value) >> op; } Value Const::operator>>(const Inc& op) const { return Value(value) >> op; } Value Const::operator>>(const Print& op) const { return Value(value) >> op; } int main() { // Example usage: 5² = 25, then +1 = 26, then +1 = 27, then print 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 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 | #include <iostream> // Forward declarations to allow for operator>> overloading class Square; class Inc; class Print; // Value class to pass data through the chain class Value { public: int data; Value(int val) : data(val) {} Value operator>>(const Square& op) const; Value operator>>(const Inc& op) const; Value operator>>(const Print& op) const; }; // Const class that initializes a value class Const { private: int value; public: Const(int val) : value(val) {} // Allows Const to be the first element in the chain Value operator>>(const Square& op) const; Value operator>>(const Inc& op) const; Value operator>>(const Print& op) const; }; // Square class that squares the input value class Square { public: int apply(int val) const { return val * val; } }; // Inc class that increments the input value class Inc { public: int apply(int val) const { return val + 1; } }; // Print class that outputs the current value class Print { public: int apply(int val) const { std::cout << val << std::endl; return val; } }; // Operator implementations for Value class Value Value::operator>>(const Square& op) const { return Value(op.apply(data)); } Value Value::operator>>(const Inc& op) const { return Value(op.apply(data)); } Value Value::operator>>(const Print& op) const { return Value(op.apply(data)); } // Operator implementations for Const class Value Const::operator>>(const Square& op) const { return Value(value) >> op; } Value Const::operator>>(const Inc& op) const { return Value(value) >> op; } Value Const::operator>>(const Print& op) const { return Value(value) >> op; } int __delete_this__main() { // Example usage: 5² = 25, then +1 = 26, then +1 = 27, then print Const(5) >> Square() >> Inc() >> Inc() >> Print(); return 0; } int main() { Const(2) >> Square() >> Inc() >> Square() >> Square() >> Print(); return 0; } |
625
Testing if the previous output contains the string 625
: True