copy constructor is called when an object is created while assignment overload is called when an object has been created.
For example
#include <iostream>
using namespace std;
class OBJ
{
public:
OBJ(){}
OBJ(OBJ &obj2){
cout<<"copy constructor"<<endl;
}
void operator = (OBJ& obj2){
cout<<"assignment overloading"<<endl;
}
};
int main()
{
OBJ ob1;
OBJ ob2=ob1; //output "copy constructor"
OBJ ob3(ob1); //output "copy constructor"
OBJ ob4;
ob4=ob1; //output "assignment overloading"
return 0;
}
原文链接: https://www.cnblogs.com/bianjunjie/archive/2013/05/18/3085467.html
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