Here is an example of a Program to enter an integer and output the cube of that integer
int cube(int x); //The prototype.
cout << "Enter an integer : ";
cout << "The cube of " << a << " is : " << cube(a) << endl; //Call the function cube(a).
//Defining the function.
int cube(int x)
Here a function called the cube of a number is being created and that function defined and is stored in a variable called int y. Where, y = x*x*x which x3.
When we run the function by entering a number the output, i.e., the cube of that particular number is generated.
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