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;
}