C Program To swap two numbers using pointers

#include<stdio.h>
int swap(int *n1,int *n2);
int main(){
int num1,num2;
printf("enter number 1:- \t");
scanf("%d",&num1);
printf("enter number 2:- \t");
scanf("%d",&num2);
swap(&num1,&num2);
printf("\n Number 1 is %d \n",num1);
printf("NUmber 2 is %d",num2);
return 0;
}

int swap(int *n1,int *n2){
int temp;
temp=*n1;
*n1=*n2;
*n2=temp;
return n1,n2;

}

Output