Write an Example Program For C Function (Using Call By Reference)?

#include<stdio.h>
// function prototype, also called function declaration
void swap(int *a, int *b);

int main()
{
int m = 22, n = 44;
clrscr();
// calling swap function by reference
printf(“values before swap m = %d \n and n = %d”,m,n);
swap(&m, &n);
getch();
return(0);
}

void swap(int *a, int *b)
{
int tmp;
tmp = *a;
*a = *b;
*b = tmp;
printf(“\n values after swap a = %d \nand b = %d”, *a, *b);
}

Output :-

callbyreference

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