类的简单运算

 1 #include <iostream>
 2 using namespace std;
 3  
 4 class rectangle
 5 {
 6 private:
 7     int length,width;
 8 public:
 9     rectangle(){};
10     rectangle(int a,int b);
11     rectangle tlength(rectangle A,rectangle B);
12     void display(rectangle C);
13 };
14 rectangle::rectangle(int a,int b)
15 {
16     length=a;width=b;
17 }
18 rectangle rectangle::tlength(rectangle A,rectangle B)
19 {
20     A.length= A.length + B.length;
21     A.width=A.width+B.width;
22     return A;
23 }
24 void rectangle::display(rectangle C)
25 {
26     cout<<(C.length+C.width)*2;
27 }
28 void main()
29 {
30     rectangle A(1,2),B(3,4),C;
31     C=C.tlength(A,B);
32     C.display(C);
33 }