拷贝构造函数的初始化方法

#include <bits/stdc++.h>
using namespace std;

class Student {
    
    
	private:
		int id;
		string name;
		double score;
	public:
		Student(int d, string ame, double core): id(d), name(ame) //不同的方式。
		{
    
    
			score = core;
		}
		void print() {
    
    
			cout << "学号：" << id << endl;
			cout << "姓名：" << name << endl;
			cout << "分数：" << score << endl;
		}
};

int main () {
    
    
	Student s(2021, "FH", 90);
	s.print();
	return 0;
}

常规点

#include <bits/stdc++.h>
using namespace std;

class Student {
    
    
	private:
		int id;
		string name;
		double score;
	public:
		Student(int d, string ame, double core)
		{
    
    
			id=d;
			name = ame;
			score = core;
		}
		void print() {
    
    
			cout << "学号：" << id << endl;
			cout << "姓名：" << name << endl;
			cout << "分数：" << score << endl;
		}
};

int main () {
    
    
	Student s(2021, "FH", 90);
	s.print();
	return 0;
}

如果不是拷贝构造函数好像会出错。