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  1. // mushing everyting into one file for easier demonstration 
  2. #include<iostream>
  3. #include<string>
  4. using namespace std ; // this is a dangerous thing to place in a header
  5.                       // because it is applied to everything that includes this header
  6.                       // you can break files that count on proper scope resolution 
  7. class Animal{
  8.     string name ;
  9.     int age  ;
  10.  
  11. public :
  12.     int a[] ;
  13.     Animal(string name , int age ):name(name) ,age(age) {}
  14.     Animal(const Animal & other);
  15.     Animal& operator=(const Animal & other);
  16. };
  17.  
  18. //#include <bits/stdc++.h> don't use stuff from bits. The are internal implementation headers
  19. #include<sstream>
  20.  
  21. int main(){
  22.  
  23.     Animal elephant("ele" ,12);
  24.     Animal cow("cow" ,22) ;
  25.     cow = elephant ;
  26.     cow.a[0]=5 ;
  27.     return 0 ;
  28. }
  29.  
  30. Animal::Animal(const Animal & other){
  31.     cout<<"copy constructor is called"<<endl ;
  32.     this->age=other.age ;
  33.     this->name = other.name ;
  34. }
  35. Animal & Animal::operator=(const Animal & other){
  36.     cout<<"Assignment operator is called"<<endl ;
  37.     this->age=other.age ;
  38.     this->name = other.name ;
  39. }
Success #stdin #stdout 0s 4328KB
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stdin
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Standard input is empty
stdout
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Assignment operator is called
https://ideone.com/WlLTUa
language:
C++ (gcc 8.3)
created:
7 years ago
visibility:
public

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