1一個對象調(diào)用另一個對象時候調(diào)用拷貝構(gòu)造函數(shù)
源代碼：
#include<iostream>
using namespace std;
class Point{
private:
int x,y;
public:
Point(int x,int y){this->x=x;this->y=y;}
Point(Point& p){
this->x=p.x;
this->y=p.y;
cout<<"拷貝構(gòu)造函數(shù)被調(diào)用！"<<endl;
}
int Getx(){return x;}
int Gety(){return y;}
};
int main(){
Point A(1,2);
Point B(A);
cout<<B.Gety()<<endl;
}
2當(dāng)函數(shù)的參數(shù)是一個類 類型時 調(diào)用拷貝構(gòu)造函數(shù)
源代碼2：
#include<iostream>
using namespace std;
class Point{
private:
int x,y;
public:
Point(int x,int y){this->x=x;this->y=y;}
Point(Point& p){
this->x=p.x;
this->y=p.y;
cout<<"拷貝構(gòu)造函數(shù)被調(diào)用！"<<endl;
}
int Getx(){return x;}
int Gety(){return y;}
};
int func1(Point p){
cout<<p.Getx()<<endl;
}
int main(){
Point A(1,2);
func1(A);
}
3當(dāng)函數(shù)的返回值類型是類 類型時 調(diào)用構(gòu)造函數(shù) ...
#include<iostream>
using namespace std;
class Point{
private:
int x,y;
public:
Point(int x,int y){this->x=x;this->y=y;}
Point(Point& p){//拷貝構(gòu)造函數(shù)
this->x=p.x;
this->y=p.y;
cout<<"拷貝構(gòu)造函數(shù)被調(diào)用！"<<endl;
}
int Getx(){return x;}
int Gety(){return y;}
};
int func1(Point p){
cout<<p.Getx()<<endl;
}
Point func2(){
Point A1(12,23);
return A1;//調(diào)用拷貝構(gòu)造函數(shù)
}
int main(){
Point B=func2();
cout<<B.Getx()<<endl;
}
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