温习C语言(2)：指针与函数参数

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#include<stdio.h>   void swap(int *px, int *py) {     int temp;     temp = *px;     *px = *py;     *py =temp; }   int main(int argc,char **argv) {       int x = 1, y = 2;     printf("x,y is %d,%d\n",x,y);     swap(&x,&y);     /*     int *px = &x;     int *py = &y;     swap(px,py);     */            printf("x,y is %d,%d\n",x,y);           return 0; }