c、c++引用

C的引用：

#include <stdio.h>void ex(int* x,int* y){        int* ptr=x;        x=y;        y=ptr;        printf("*x=%d,*y=%d\n",*x,*y);}int main(void){        int x=5;        int y=10;        ex(&x,&y);        return 0;}

上述代码运行结果:*x=10,*y=5;

C++的引用

#include <stdio.h>void ex(int &x,int &y){        int tmp=x;        x=y;        y=tmp;        printf("x=%d,y=%d\n",x,y);}int main(void){        int a=3;        int b=4;        ex(a,b);        printf("a=%d,b=%d\n",a,b);        return 0;}

运行结果：

x=4,y=3;

a=4,b=3;