Swap two numbers

#include<stdio.h>
void fun(int *x,int *y)
{
    
	 int t;
	 t=*x;*x=*y;*y=t;
}
int  main()
{
    
	 int a,b;
	 a=8;
	 b=3;
	 fun(&a,&b);
	 printf("%d %d\n",a,b);
}