增添拷贝构造函数，并使用对象obj1初始化新对象

添加拷贝构造函数，并使用对象obj1初始化新对象。
#include<iostream.h> 
class Sample 
{ 
public: 
Sample(); 
Sample(int); 
~Sample(); 
void display(); 
private: 
int x; 
}; 
Sample::Sample() {

x=0; 
cout<<"constructing normally\n"; 
}
 
Sample::Sample(int m) {
x=m; 
cout<<"constructing with a number:"<<x<<endl;
} 

void Sample::display() {
cout<<"display a number:"<<x<<endl; 
} 
Sample::~Sample() {
cout<<"destructing\n"; 
} 
int main() 
{ 
Sample obj1; 
Sample obj2(20); 
obj1.display(); 
obj2.display(); 
return 0;
}

[解决办法]

C/C++ code

#include<iostream.h> class Sample { public: Sample(); Sample(int);Sample(const Sample &e); //增加 ~Sample(); void display(); private: int x; }; Sample::Sample() {x=0; cout<<"constructing normally\n"; } Sample::Sample(int m) {x=m; cout<<"constructing with a number:"<<x<<endl;}Sample::Sample(const Sample &e) //增加 { x=e.x; cout<<"copy constructor"<<endl;                     }void Sample::display() {cout<<"display a number:"<<x<<endl; } Sample::~Sample() {cout<<"destructing\n"; } int main() { Sample obj1; Sample obj2(20); obj1.display(); obj2.display(); Sample obp(obj1);//增加 obp.display();//增加 system("pause");return 0;}