copy和copy assignment的区别

copy和copy assignment的区别

#include  < cstdlib >
#include  < iostream >
using   namespace  std;

class  foo
{
public:
    foo(){}
    foo(const foo& other){cout<<"copy\n";}
    foo& operator=(foo& rhs){cout<<"assign\n"; return *this;}
} ;

int  main()
{
    foo f;
    foo f2 = f;
    foo f3;
    f3 = f;
    system("PAUSE");
    return 0;
}