fork download
copy 
  1. #include <iostream>
  2.  
  3. class X {
  4. public:
  5.   int x;
  6.  
  7.   X(int x) :
  8.     x(x) {
  9.  
  10.     std::cout << "X::X(int), x = " << x << '\n';
  11.   }
  12.  
  13.   X(const X& other) :
  14.     x(other.x) {
  15.  
  16.     std::cout << "X::X(const X &), x = " << x << ", other.x = " << other.x << '\n';
  17.   }
  18.  
  19.   X &operator=(const X& other) {
  20.     std::cout << "X::operator=(const X &), x = " << x << ", other.x = " << other.x << '\n';
  21.     if (&other == this) {
  22.       return *this;
  23.     }
  24.  
  25.     x = other.x;
  26.  
  27.     return *this;
  28.   }
  29.  
  30.   ~X() {
  31.     std::cout << "X::~X(int), x = " << x << '\n';
  32.   }
  33. };
  34.  
  35. X fun(X obiekt) {
  36.   // Obiekt tymczasowy:
  37.   return X(obiekt.x * 2);
  38. }
  39.  
  40. int main() {
  41.  
  42.   std::cout << "obiekt\n";
  43.   X obiekt(5);
  44.  
  45.   std::cout << "przypisanie\n";
  46.   obiekt = 10;
  47.  
  48.   std::cout << "wywolanie funkcji\n";
  49.   fun(obiekt);
  50.  
  51.   std::cout << "wywolanie funkcji z obiektem tymczasowym\n";
  52.   obiekt = fun(X(30));
  53.  
  54.   return 0;
  55. }
Success #stdin #stdout 0.02s 2724KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
obiekt
X::X(int), x = 5
przypisanie
X::X(int), x = 10
X::operator=(const X &), x = 5, other.x = 10
X::~X(int), x = 10
wywolanie funkcji
X::X(const X &), x = 10, other.x = 10
X::X(int), x = 20
X::~X(int), x = 20
X::~X(int), x = 10
wywolanie funkcji z obiektem tymczasowym
X::X(int), x = 30
X::X(int), x = 60
X::operator=(const X &), x = 10, other.x = 60
X::~X(int), x = 60
X::~X(int), x = 30
X::~X(int), x = 60
https://ideone.com/0s3IS
language:
C++ (gcc 8.3)
created:
11 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!