#include<stdio.h>
void swap(int*, int*);
int main(){
    int a = 10;
    int b = 20;
    printf("Before swapping a=%d,b=%d\n",a,b);
    swap(&a,&b);
    printf("After swapping a=%d,b=%d\n",a,b);
}
void swap(int *a, int *b){
    int temp;
    temp = *a;
    *a = *b;
    *b = temp;
    printf("After swapping values in function a=%d,b=%d\n",*a,*b);
}
}