重载（）运算符
1 #include <iostream>
2 using namespace std;
3
4 class Distance
5 {
6 private:
7 int feet; // 0 到无穷
8 int inches; // 0 到 12
9 public:
10 // 所需的构造函数
11 Distance()
12 {
13 feet = 0;
14 inches = 0;
15 }
16 Distance(int f, int i)
17 {
18 feet = f;
19 inches = i;
20 }
21 // 重载函数调用运算符
22 Distance operator()(int a, int b, int c)
23 {
24 Distance D;
25 // 进行随机计算
26 D.feet = a + c + 10;
27 D.inches = b + c + 100;
28 return D;
29 }
30 // 显示距离的方法
31 void displayDistance()
32 {
33 cout << "F: " << feet << " I:" << inches << endl;
34 }
35 };
36 int main()
37 {
38 Distance D1(11, 10), D2;
39
40 cout << "First Distance : ";
41 D1.displayDistance();
42
43 D2 = D1(10, 10, 10); // invoke operator()
44 cout << "Second Distance :";
45 D2.displayDistance();
46
47 return 0;
48 }
重载->运算符
1 #include <iostream>
2 using namespace std;
3
4 class A
5 {
6 public:
7 void display() { cout << "yes,ok" << endl; }
8 };
9
10 class P
11 {
12 public:
13 P(A& ra) :ptr(&ra) {}
14 A* operator->() { return ptr; }
15 private:
16 A* ptr;
17 };
18
19 class PP
20 {
21 public:
22 PP(A& ra) :p(ra) {}
23 P operator->() { return p; }
24 private:
25 P p;
26 };
27
28 int main()
29 {
30 A a;
31 P p(a);
32 p->display();
33
34 cout << endl;
35
36 PP pp(a);
37 pp->display();
38 return 0;
39 }
View Code