C language: pointer implementation to exchange the value of two variables

Swap the values ​​of two variables with pointers (10 points)

Topic content:

Swap the values ​​of two variables with pointers

Main function reference:

int main( ) { int a,b; scanf("%d%d",&a,&b); swap(&a,&b); printf("%d %d",a,b); return 0; }

Input format:

two variables

 

Output format:

two variables

 

Input sample:

5 8

 

Sample output:

8 5

 

code

#include "stdio.h"


// swap the values ​​of the two variables
void swap2(int *p1,int *p2)
{
    int temp;
    temp = *p1;
    *p1 = *p2;
    *p2 = temp;

}



intmain()
{

//        int c = 3,d = 4;
// printf("swap2 before swapping cd: %d,%d\n",c,d);
	int c,d;
	scanf("%d %d",&c,&d);

    swap2(&c,&d);
// printf("swap2 after swapping cd: %d,%d\n",c,d);
	printf("%d %d",c,d);

}