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  1. #include <string>
  2. #include <sstream>
  3. #include <iostream>
  4. int main()
  5. {
  6.     std::string str="123";
  7.     std::istringstream buf(str.substr(1,2));
  8.     long int num;
  9.     buf >> num;
  10.     std::cout << num << '\n';
  11. }
Success #stdin #stdout 0.01s 2860KB
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Standard input is empty
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23
https://ideone.com/7wBBQ
language:
C++ (gcc 8.3)
created:
12 years ago
visibility:
public

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