[C++ 总结记录] 构造函数初始化注意点

class Cat{public: int age; string name; //对属性一一赋值 Cat(int age,string name){     this->name = name;     this->age = age; }}

class Cat {private:	string name;	int age;public:	Cat(string name,int age):name(name),age(age){}	void printInfo() {		cout << "name=" << this->name << endl;		cout << "age=" << this->age << endl;	}	};int main() {	Cat c1("黑猫", 23);	c1.printInfo();	return 0;}

class Cat {private:	string name;	int age;public:	Cat(string name,int age):name(name){ // 部分初始化列表		this->age = 100000; //采用普通的一一赋值	}	void printInfo() {		cout << "name=" << this->name << endl;		cout << "age=" << this->age << endl;	}	};

#include <iostream>using namespace std;class Demo{private:    int m_a;    int m_b;public:    Demo(int b);    void show();};Demo::Demo(int b): m_b(b), m_a(m_b){ }void Demo::show(){ cout<<m_a<<", "<<m_b<<endl; }int main(){    Demo obj(100);    obj.show();    return 0;}	

class Cat {private:	const string name;	const int age;	const int weight;public:	Cat(string name, int a) :name(name), weight(a) ,age(a){ // 部分初始化列表	}	void printInfo() {		cout << "name=" << this->name << endl;		cout << "age=" << this->age << endl;		cout << "weight=" << this->weight << endl;	}
};