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  1. #include <iostream>
  2.  
  3. using std::cout;
  4. using std::endl;
  5.  
  6. class A{
  7. public:
  8.     A(){
  9.         cout << "parameterless" << endl;
  10.     }
  11.  
  12.     A(const char *str){
  13.         cout << "Parameter is " << str <<endl;
  14.     }
  15. };
  16.  
  17. class B{
  18.     A _argless;
  19.     A _withArg;
  20.  
  21. public:
  22.     // note that you need not call argument-less constructor explicitly.
  23.     B(): _withArg("42"){
  24.     }
  25. };
  26.  
  27. int main(){
  28.     B b;
  29.  
  30.     return 0;
  31. }
Success #stdin #stdout 0s 3340KB
comments (?)
stdin
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Standard input is empty
stdout
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parameterless
Parameter is 42
https://ideone.com/fzfTnM
language:
C++ (gcc 8.3)
created:
10 years ago
visibility:
public

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