利用全局函數實現

#define _CRT_SECURE_NO_WARNINGS #include <iostream>using namespace std;class Cube { public:void setABC(int a, int b, int c){m_a = a;m_b = b;m_c = c;}int getArea(){return ((m_a*m_b) + (m_b*m_c) + (m_a*m_c)) * 2;}int getVolume(){return m_a*m_b*m_c;}int getA(){return m_a;}int getB(){return m_b;}int getC(){return m_c;} private:int m_a;int m_b;int m_c; };//全局函數 bool judgeCube(Cube &c1, Cube &c2) {if (c1.getA() == c2.getA() && c1.getB() == c2.getB() && c1.getC() == c2.getC()){return true;}else{return false;}}int main(void) {Cube c1;c1.setABC(10, 20, 30);Cube c2;c2.setABC(10, 20, 30);cout << "c1的體積是：" << c1.getVolume() << endl;cout << "c1的面積是：" << c2.getArea() << endl;if (judgeCube(c1, c2) == true){cout << "相等" << endl;}else {cout << "不相等" << endl;}return 0; }

利用成員函數實現：

#define _CRT_SECURE_NO_WARNINGS #include <iostream>using namespace std;class Cube { public:void setABC(int a, int b, int c){m_a = a;m_b = b;m_c = c;}int getArea(){return ((m_a*m_b) + (m_b*m_c) + (m_a*m_c)) * 2;}int getVolume(){return m_a*m_b*m_c;}int getA(){return m_a;}int getB(){return m_b;}int getC(){return m_c;}
　　//同類之間無私處bool judgeCube(Cube &another){if (m_a == another.m_a &&m_b == another.m_b &&m_c == another.m_c){return true;}else{return false;}}private:int m_a;int m_b;int m_c; };int main(void) {Cube c1;c1.setABC(10, 20, 30);Cube c2;c2.setABC(10, 20, 30);cout << "c1的體積是：" << c1.getVolume() << endl;cout << "c1的面積是：" << c2.getArea() << endl;if (c1.judgeCube(c2) == true){cout << "相等" << endl;}else{cout << "不相等" << endl;}return 0; }

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轉載于:https://www.cnblogs.com/yuehouse/p/9788541.html

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