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  1. #include <iostream>
  2.  
  3. class Example {
  4.     private:
  5.         int a;
  6.         // lots of important variables that live on the heap
  7.     public:
  8.         int getA() { return a; }
  9.  
  10.         // Example() = default;
  11.         Example() {
  12.         	std::cout << "default constructor" << std::endl;
  13.         	a = 0;
  14.         }
  15.  
  16.         Example(int a_local) {
  17.             a = a_local;
  18.             std::cout << "custom constructor" << std::endl;
  19.             /* allocating memory, etc. ... */
  20.         }
  21. };
  22.  
  23. int main() {
  24. 	std::cout << "Running default constructor" << std::endl;
  25. 	Example e1;
  26. 	std::cout << "e1.a is " << e1.getA() << std::endl;
  27.  
  28. 	std::cout << "Running custom constructor" << std::endl;
  29. 	Example e2(500);
  30. 	std::cout << "e2.a is " << e2.getA() << std::endl;
  31. }
Success #stdin #stdout 0s 15232KB
comments (?)
stdin 
Standard input is empty
stdout 
Running default constructor
default constructor
e1.a is 0
Running custom constructor
custom constructor
e2.a is 500
https://ideone.com/5y5iAk
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
secret

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