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  1. #include <iostream>
  2. #include <string>
  3. #include <cctype>
  4.  
  5. using namespace std;
  6.  
  7. int main() {
  8.  
  9.     string name;
  10.  
  11.     while (true) {
  12.  
  13.         bool ok = true;
  14.  
  15.         cout << "Enter your name:\n";
  16.  
  17.         getline(cin, name);
  18.  
  19.         size_t nameSize = name.size();
  20.  
  21.         if (nameSize == 0) continue;
  22.  
  23.         for (size_t i = 0; i < nameSize; ++ i) {
  24.             if (
  25.                 !(
  26.                     isalpha(name[i]) ||
  27.                     name[i] == ' ' // || ...
  28.                  )
  29.                ) {
  30.                 ok = false; break;
  31.             }
  32.         }
  33.  
  34.         if (ok) break;
  35.     }
  36.  
  37.     cout << "Hello, " << name << "!" << endl;
  38.  
  39.     return 0;
  40. }
Success #stdin #stdout 0s 3476KB
comments (?)
stdin
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1234 :P
(an empty line follows)

Gandalf the White
stdout
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Enter your name:
Enter your name:
Enter your name:
Enter your name:
Hello, Gandalf the White!
https://ideone.com/KuQgBL
language:
C++ (gcc 8.3)
created:
10 years ago
visibility:
secret

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