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  1. #include <algorithm>
  2. #include <string>
  3. #include <cctype>
  4. #include <iostream>
  5.  
  6. bool allDigits(const std::string& s)
  7. {
  8.    return std::all_of(s.begin(), s.end(), ::isdigit);
  9. }
  10.  
  11. int main()
  12. {
  13. 	std::cout << allDigits("123456789") << '\n';	
  14. 	std::cout << allDigits("12345F6789") << '\n';	
  15. }
Success #stdin #stdout 0s 3456KB
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https://ideone.com/6kbvPi
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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