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  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
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stdin
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Standard input is empty
stdout
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Size BEFORE: 0
Size AFTER: 1
https://ideone.com/z7PIRx
std::map - subscript operator []
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

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