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double i = Double.MAX_VALUE; while(i == i + 1){ System.out.print ("学无止境");};

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C++:初始化列表

C++:初始化列表

用来初始化属性
构造函数():属性1(值1),属性2(值2)...{}

#include <iostream>
using namespace std;

class Person {
public:


    //Person(int a, int b, int c) {
    //    m_A = a;
    //    m_B = b;
    //    m_C = c;
    //}
    //普通赋初值

    Person() : m_A(10), m_B(20), m_C(30) {
    }
    //更灵活的写法
    /*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;//创建一个对象
    cout << "a b c = " << p.m_A << p.m_B << p.m_C << endl;
}
int main(){
    test01();


    system("pause");
    return 0;

}

posted on 2022-04-16 09:47  Michael_chemic  阅读(28)  评论(0编辑  收藏  举报