Question

Why assign a function to a variable? What’s the point in assigning int x, y to ReadNumber() ? Is it for storing return value of function in a variable? Or is this just a way to pass arguments?

#include <iostream>

int ReadNumber()
{
    using namespace std;
    cout << "Enter a number: ";
    int x;
    cin >> x;
    return x;
}

void WriteAnswer(int x)
{
    using namespace std;
    cout << "The answer is " << x << endl;
}

int main()
{
    int x = ReadNumber();
    int y = ReadNumber();
    WriteAnswer(x+y);
    return 0;
}

Answer 1

Yes, it is storing the return value of the function.

The code calls the ReadNumber function twice first. ReadNumber reads a string from the console then returns it as an int. The code stores the two function returns. It then adds these two numbers together and passes it as an argument to the WriteAnswer function. The WriterAnswer function takes the argument that was passed in and prints it out.