Call By Reference에 의한 Swap

/* reference_swap.c */

#include <stdio.h>

int main(void)

{

int val1=10;

int val2=20;

printf("Before val1 : %d \n", val1);

printf("Before val2 : %d \n", val2);

swap(&val1, &val2);  //val1, val2 주소전달

printf("After val1 : %d \n", val1);

printf("After val2 : %d \n", val2);

return 0;

}

void swap(int* a, int* b)

{

    int temp=*a;

    *a=*b;

    *b=temp;

}



결과값