下面的程序有错吗?为什么错了,给出正确的程序。欢迎大家给出不同的答案。
#include <iostream> using namespace std; void swapxy(char *a,char *b) { int x = *a,y = *b; x = x+y; y = x-y; x = x-y; *a = x,*b = y; } void main(int argv,char argc[]) { char a = 'A',b = 'B'; char &x = a,&y = b; cout<<"before swaping:"<<a<<" "<<b<<endl; swapxy(x,y); cout<<"after swaping:"<<a<<" "<<b<<endl; system("pause"); }