swap case condition using call by reference

//swap case condition using call by reference
#include<stdio.h>
void swapr(int*,int*);
int main()
{
     int a,b;
     printf("enter values for a and b :- \n");
     scanf("%d %d",&a,&b);
     swapr(&a,&b);
     printf("a=%d b=%d\n",a,b);
     return 0;

}

void swapr(int *x,int *y)
{
    int t;
    t=*x;
    *x=*y;
    *y=t;
}