fork(1) download 
  1. #include <iostream>
  2. #include <map>
  3.  
  4. int main()
  5. {
  6. 	std::map<int, int> a;
  7.  
  8. 	std::cout << "Size BEFORE: " << a.size() << '\n';
  9.  
  10. 	int b = a[0];
  11.  
  12. 	std::cout << "Size AFTER: " << a.size() << '\n';
  13.  
  14. 	return 0;
  15. }
Success #stdin #stdout 0s 15240KB
comments (?)
stdin 
Standard input is empty
stdout 
Size BEFORE: 0
Size AFTER: 1
https://ideone.com/z7PIRx
std::map - subscript operator []
language:
C++14 (gcc 8.3)
created:
7 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!