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  1. #include <iostream>
  2. #include <string>
  3.  
  4. int main()
  5. {
  6. 	std::string s = "10";
  7.  
  8. 	int i = 0;
  9. 	for (char c: s)
  10. 	{
  11. 		if (c >= '0' && c <= '9') {
  12. 			i = i * 10 + (c - '0');
  13. 		}
  14. 		else {
  15. 			std::cout << "Bad Input";
  16. 			return 1;
  17. 		}
  18. 	}
  19.  
  20. 	std::cout << i << '\n';
  21.  
  22. 	return 0;
  23. }
Success #stdin #stdout 0s 4392KB
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stdin
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Standard input is empty
stdout
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10
https://ideone.com/MMkYCx
language:
C++14 (gcc 8.3)
created:
5 years ago
visibility:
public

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