Program Of Call By Reference In C

#include<stdio.h>

#include<conio.h>

int sum(int *x,int *y);

main()

{

int a,b,c;

clrscr();

printf("Enter first =");

scanf("%d",&a);

printf("Enter 2nd =");

scanf("%d",&b);

c=sum(&a,&b);

printf("\n ANswer=%d",c);

getch();

}

int sum(int *x,int *y)

{

int z;

z= *x + *y;

return z;

}