C++物件導向類的執行個體題目六

問題描述：

編寫一個程式計算兩個給定長方形的面積，其中在設計類成員函數addarea()（用於計算兩個長方形的總面積）時使用對象作為參數。

程式碼：

#include<iostream>using namespace std;class Rectangular{public:Rectangular(double w,double l){width = w;length = l;}double getc(){circumference = width + length;return circumference;}double adddata(Rectangular &r){return (circumference + r.getc());}private:double width;double length;double circumference;}; int main(){Rectangular r1(2.5,3.5);cout<<"Circumference of r1 ="<<r1.getc()<<endl; Rectangular r2(2,3);cout<<"Circumference of r2 ="<<r2.getc()<<endl;cout<<"Circumference of r1+r2 ="<<r1.adddata(r2)<<endl;return 0; } 

結果輸出：

Circumference of r1 =6Circumference of r2 =5Circumference of r1+r2 =11