C语言例程25：函數的引用調用

#include <stdio.h>
#include <stdlib.h>

void swap(int *x, int *y);
int main(int argc, char *argv[])
{
    int i, j;
    i = 12;
    j = 36;

    printf("i and j before swapping: %d %d\n", i, j);

    swap(&i, &j);

    printf("i and j after swapping: %d %d\n", i, j);

    system("pause");
    return 0;
}

void swap (int *x, int *y)
{
    int temp;

    temp = *x;
    *x = *y;
    *y = temp;
}