#include <stdio.h>

void cubeByReference ( int *nPtr ); //prototpye

int main()
{
    int num = 5;
    int *p = &num;
      printf("The original value of the number is %d", num);

    //Pass adress of number to cubeByReference
    cubeByReference (p);

    printf("\n The new value of number is %d\n", num );
    return 0;
} // end main


// calculate cuve of *nPtr; modifies number in main
void cubeByReference (int *nPtr )
{
    *nPtr = *nPtr * *nPtr * *nPtr;
}