初始化列表

Posted 2021-03-04 loliconinvincible

注意：初始化成员列表(参数列表)只能在构造函数使用

 1 class Data
 2 {
 3 private:
 4     int m_a;
 5     int m_b;
 6     int m_c;
 7 public:
 8     //成员名(形参名)
 9     Data(int a,int b,int c):m_a(a),m_b(b),m_c(c)
10     {
11         //m_a = a;
12        // m_b = b;
13         //m_c = c;
14         cout<<"有参构造"<<endl;
15     }
16     ~Data()
17     {
18         cout<<"析构函数"<<endl;
19     }
20     void showData(void)
21     {
22         cout<<m_a<<" "<<m_b<<" "<<m_c<<endl;
23     }
24 };
25 void test01()
26 {
27     Data ob(10,20,30);
28     ob.showData();
29 }