4.2.6 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)…·{}

#include<iostream>
using namespace std;//初始化列表
class Person
{
public://传统初始化操作//Person(int a, int b, int c)//{//	m_A = a;//	m_B = b;//	m_C = c;//}//初始化列表 初始化属性Person(int a, int b, int c) : m_A(a), m_B(b), m_C(c){}int m_A;int m_B;int m_C;
};void test01()
{//Person p(10, 20, 30);Person p(30,20,10);cout << "m_A = " << p.m_A << endl;cout << "m_A = " << p.m_B << endl;cout << "m_A = " << p.m_C << endl;}int main()
{test01();system("pause");return 0;
}

也可以从main函数传入值