1 #include <iostream>
2 using namespace std;
3 class Test1
4 {
5 public:
6 int m;
7 Test1(int n) { num = n; } //普通构造函数
8 void Show()
9 {
10 cout << "private num = " << num <<endl;
11 }
12 private:
13 int count;
14 int num;
15 int n;
16 };
17 class Test2
18 {
19 public:
20 explicit Test2(int n) { num = n; } //explicit(显式)构造函数
21 private:
22 int num;
23 };
24 int main()
25 {
26 Test1 t1 = 12; //隐式调用其构造函数, 成功
27 t1.Show();
28
29 //Test2 t2 = 12; //编译错误,不能隐式调用其构造函数
30 Test2 t3(12); //显式调用成功
31 return 0;
32 }
