指针作为函数的形参

#include
“stdio.h”

void swap(int *pa, int *pb)

{

    int temp;

    temp = *pa;

    *pa = *pb;

    *pb = temp;

}

int main()

{

    int a = 123, b = 456;

    printf(“%d,%d\n”,a,b);

    swap(&a, &b);

    printf(“%d,%d\n”,a,b);

return 0;

}