استفسار عن حل سؤال ب c++

#include <iostream>


#include <cmath>


using namespace std;








// function summation


float summation(float x, float y) {


    float f = x + y;


    return f;


}





// function division


float division(float x, float y) {


    float f = x / y;


    return f;


}





// function Subtraction


float Subtraction(float x, float y) {


    float f = x - y;


    return f;


}





// function Multiplication


float Multiplication(float x, float y) {


    float f = x * y;


    return f;


}





// function Exponent


float Exponent(float x, float y) {


    float f = pow(x, y);


    return f;


}














int main()


{


    // variable string


    string sum;


    float a, b;


    cout << "Enter Valur to a and b:\n";


    cin >> a >> b;


    cout << "Enter Value To sum:\n";


    cin >> sum;





// if


    if (sum == "+") {





        cout << summation(a,b);





    }else if (sum == "/") {





        cout << division(a, b);








    }else if (sum == "-") {





        cout << Subtraction(a, b);





    }else if (sum == "*") {





        cout << Multiplication(a, b);





    }else if (sum == "^") {





        cout << Exponent(a, b);





    }else {





        cout << "Error";


    }














 return 0;


}