關(guān)于C++復(fù)制構(gòu)造函數(shù)的實(shí)現(xiàn)講解

2020-05-23 13:23:54

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復(fù)制構(gòu)造函數(shù)是一種特殊的構(gòu)造函數(shù)，有一般構(gòu)造函數(shù)的特性。它的功能是用一個(gè)已知的對(duì)象來初始化一個(gè)被創(chuàng)建的同類對(duì)象。復(fù)制構(gòu)造函數(shù)的參數(shù)傳遞方式必須按引用來進(jìn)行傳遞，請(qǐng)看實(shí)例：

#include <iostream>#include <cstring>using namespace std ; class Student { private : char name[8]; int age ; char sex ;  int score ; public : void disp(); //打印信息的函數(shù)聲明 Student(char name[],int age , char sex ,int score); //構(gòu)造函數(shù)聲明 Student(Student &dx); //復(fù)制構(gòu)造函數(shù)的聲明 ~Student(); //析構(gòu)函數(shù)的聲明};//打印信息函數(shù)的實(shí)現(xiàn)void Student::disp(){ cout << this->name << endl ;  cout << this->age << endl ;  cout << this->sex << endl ;  cout << this->score << endl ;}//構(gòu)造函數(shù)的實(shí)現(xiàn) Student::Student(char name[],int age , char sex ,int score){ strcpy(this->name,name); this->age = age ;  this->sex = sex ; this->score = score ;}//復(fù)制構(gòu)造函數(shù)的實(shí)現(xiàn)Student::Student(Student &dx){ strcpy(this->name , dx.name); this->age = dx.age ;  this->sex = dx.sex ; this->score = dx.score ;} //析構(gòu)函數(shù)的實(shí)現(xiàn)Student::~Student(){ cout << "程序結(jié)束" << endl ;} int main(void){ Student stu1("YYX",23,'N',86); Student stu2(stu1);  stu1.disp() ; stu2.disp() ; return 0 ;}

運(yùn)行結(jié)果：