Question

Write separately prototype and definition for a swap function to swap the values of its two integer parameters. The function does not need to return anything but the parameters need to swap values.

Answer 1

To write a swap function in C/C++, the prototype is declared before the main function, and the definition is where the code is implemented using pointers to swap the values in place.

Step-by-step explanation:

To write separately prototype and definition for a swap function that can switch the values of its two integer parameters in C or C++, you will first declare the prototype and then define the function. The prototype is a declaration of the function before the main function body, which informs the compiler about the function name and its parameters. The definition is where the actual code of the function is written.

Here is an example of how you could write the prototype and the definition:

Prototype

void swap(int *a, int *b);

Definition

void swap(int *a, int *b) {
int temp = *a;
*a = *b;
*b = temp;
}

In the definition, a temporary variable temp is used to hold the value of one of the parameters while swapping occurs. Note that we use pointers *a and *b to refer to the addresses of the variables so that their values can be swapped in place, as the changes need to be reflected in the original arguments passed to the function.