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  1. #include <iostream>
  2. #include <map>
  3. using namespace std;
  4.  
  5. int main() {
  6. 	std::map<int, int> myMap;
  7.  
  8. 	cout << "myMap size = " << myMap.size() << endl;
  9.  
  10. 	myMap[0];
  11. 	myMap[1];
  12. 	myMap[2];
  13. 	myMap[3];
  14.  
  15. 	cout << "myMap size = " << myMap.size() << endl;
  16.  
  17. 	return 0;
  18. }
Success #stdin #stdout 0s 3472KB
comments (?)
stdin 
Standard input is empty
stdout 
myMap size = 0
myMap size = 4
https://ideone.com/jXRR1n
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
secret

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