类的数组初始化后调用拷贝构造函数

#include <iostream>
#include<string>
using namespace std;
class Student
{
    private:
        int MathScore,CScore,EnglishScore;
    public:
        long stuNo;
        string stuName;
        char stuSex;
        void setScore(int mathScore,int cScore,int englishScore)
        {
            MathScore=mathScore;
            CScore=cScore;
            EnglishScore=englishScore;
        }
        void display();
        Student(string stuname)
        {stuNo=122301002;stuName=stuname;stuSex='F';}
   

        Student(long stuno)
        {stuNo=stuno;stuName="张三";stuSex='F';}
   

        Student(long stuno, string name)
        {

            stuNo=stuno;stuName=name;stuSex='F';
        }

        Student(long stuno, string name,char sex)
        {stuNo=stuno;stuName="123";stuSex=sex;}

        Student(const Student &s)
        {           

            cout<<"拷贝构造函数的调用" ;

            stuNo=s.stuNo;
            stuName=s.stuName;
            stuSex=s.stuSex;
            MathScore=s.MathScore;
               CScore=s.CScore;
            EnglishScore=s.EnglishScore;
        }

};
void Student::display(){
    cout<<"学生信息如下:"<<endl;
    cout<<"学号："<<"\t\t姓名："<<"\t性别："<<"\t数学："<<"\tC语言："<<"\t英语："<<endl;
    cout<<stuNo<<"\t"<<stuName<<"\t"<<stuSex<<"\t"<<MathScore<<"\t"<<CScore<<"\t"<<EnglishScore<<endl;   

}

int main(void)
{  cout<<"测试1";
   Student stu[4]={ Student("张三"),Student(122301002),Student(122302003,"赵五"),Student(122302004,"李四",'F')};
   cout<<"测试2";
   stu[0].setScore(80,87,56);
   stu[1].setScore(81,84,58);
   stu[2].setScore(80,90,53);
   stu[3].setScore(80,82,55);
   for (int i=0;i<4;i++)
   {
   stu[i].display();
   }
   Student stus("张三");
    stus.display();
   return 0;
}