C++Note 初始化列表

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 std::cout;
using namespace std;

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() :m_A(10), m_B(20), m_C(30)
    //{

    //}
    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);//传统初始化操作
    //Person p;//初始化列表初始化属性
    Person p(30, 20, 10);
    cout << "m_A = " << p.m_A << endl;
    cout << "m_B = " << p.m_B << endl;
    cout << "m_C = " << p.m_C << endl;
}
int main() 
{
    test01();
    system("pause");
    return 0;
}