编程学习网为您整理以下代码实例，主要实现：C++友元函数，希望可以帮到各位朋友。
#include <iostream>
using namespace std;
class Box {
double wIDth;
public:
frIEnd voID printWIDth( Box Box );
voID setWIDth( double wID );
};
// Member function deFinition
voID Box::setWIDth( double wID ) {
wIDth = wID;
}
// Note: printWIDth() is not a member function of any class.
voID printWIDth( Box Box ) {
/* Because printWIDth() is a frIEnd of Box, it can
directly access any member of this class */
cout << "WIDth of Box : " << Box.wIDth <<endl;
}
// Main function for the program
int main() {
Box Box;
// set Box wIDth without member function
Box.setWIDth(10.0);
// Use frIEnd function to print the wdith.
printWIDth( Box );
return 0;
}
本站部分内容来源互联网,如果有图片或者内容侵犯您的权益请联系我们删除！