#include <stdio.h>

//void has no return
void addone(int *numptr)
{
    (*numptr)++;
}

main()
{
    /*
    This bit of code will print out the address of the variable number,
    and then incremement number by using the numptr
    */
    
    int number = 7;
    int *numptr;
    numptr = &number;
    
    printf("\nOriginal values of variables:\n");
    
    printf("Value of numptr is %d, Value of number is %d\n", *numptr, number);

    addone(numptr);
    
    printf("\nNew values of variables:\n");
    printf("Value of numptr is %d, Value of number is %d\n", *numptr, number);

}