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  1. #include <string>
  2. #include <iostream>
  3. #include <unordered_map>
  4.  
  5. using namespace std;
  6.  
  7. void fun(int& val)
  8. {
  9.  
  10.     cout << val << endl;
  11.     val = 900;
  12. }
  13.  
  14. int main()
  15. {      
  16.     std::unordered_map<std::string, int> test;
  17.     fun(test["hello"]);
  18.  
  19.     cout << test["hello"] << endl;
  20.  
  21. }
  22.  
Success #stdin #stdout 0.01s 5476KB
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stdin
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Standard input is empty
stdout
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0
900
https://ideone.com/0oKwSg
language:
C++14 (gcc 8.3)
created:
2 years ago
visibility:
secret

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