C++(初始化列表)

初始化列表

作用:

  • C++提供了初始化列表语法,用来初始化属性

语法: 构造函数():属性1(值1),属性2(值2),属性3(值3)...{}

示例:

#include <iostream>

using namespace std;

class Person
{   
public:   
      //传统方式初始化
      //Person(int a, int b, int c)
      //{
            //m_A=a;
            //m_B=b;
            //m_C=c;
      //}
      
      //初始化列表方式初始化
      Person(int a, int b, int c):m_A(a),m_B(b),m_C(c){}
      void PrintPerson() {
	      cout << "mA:" << m_A << endl;
	      cout << "mB:" << m_B << endl;
	      cout << "mC:" << m_C << endl;
	}
private:
      int m_A;
      int m_B;
      int m_C;
};

int main(){
   	Person p(1, 2, 3);
	p.PrintPerson();


	system("pause");

	return 0;   
}

posted @ 2020-09-06 23:56  flyingswallow  阅读(141)  评论(0编辑  收藏  举报