全局函數做友元

#include <iostream> #include <string> using namespace std; class Building {friend void visit(Building* building); public:Building();/*Building(){m_sittingroom = "客廳";m_bedroom = "臥室";}*/ public:string m_sittingroom; private:string m_bedroom; }; Building::Building() {m_sittingroom = "客廳";m_bedroom = "臥室"; } void visit(Building *building) {cout << "你的朋友正在訪問你的：" << building->m_sittingroom << endl;cout << "你的朋友正在訪問你的：" << building->m_bedroom << endl; } void test01() {Building building;visit(&building); } int main() {test01();system("pause");return 0; }

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