程序是這樣的#include "stdafx.h"#include "iostream.h"struct Place{private:int x;int y;public:void SetPos(int X,int Y);void GetPos(int &X,int &Y);};void Place::SetPos(int X,int Y){x = X;y = Y;}void Place::GetPos(int &X,int &Y){X = x;Y = y;}int main(int argc, char* argv[]){Place p;//定義結(jié)構(gòu)變量p.SetPos(100,120);//賦值int x;int y;p.GetPos(x,y);//獲取值//輸出值cout << "X：" << x << "\n"<< "Y：" << y << "\n";return 0;}為了取出private變量xy的值所以使用了getpos這個(gè)函數(shù)，對于這個(gè)函數(shù)我還是不太清楚。為什么要使用&X和&Y呢？以及最后使用了getpos（）之后為什么就能直接cout<<x<<y呢？