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  1. #include <iostream>
  2. #include <algorithm>
  3.  
  4. bool ok(const std::string &input) {
  5.     return std::find_if_not( 
  6.         input.begin(), //from beginning
  7.         input.end(), //to end
  8.         isalpha //check for non-alpha characters
  9.     ) == input.end();
  10. }
  11.  
  12. int main() {
  13.     std::cout <<
  14.         ok("abc") << '\n' <<
  15.         ok("123") << '\n' <<
  16.         ok("1.4") << '\n' <<
  17.         ok("abc8def") << '\n' <<
  18.         ok("My name is Chris.");
  19. }
Success #stdin #stdout 0s 3020KB
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https://ideone.com/XjXWiI
language:
C++14 (gcc 8.3)
created:
12 years ago
visibility:
public

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