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  1. #include <iostream>
  2. #include <limits>
  3. int main()
  4. {
  5.     using namespace std;
  6.  
  7.     int n;
  8.     cout << "how many names do you want to register\n";
  9.     cin >> n;
  10.  
  11.     if (!cin) {
  12.         cin.clear(); // unset the error flag
  13.         cin.ignore( numeric_limits<streamsize>::max(), '\n'); // get rid of the bad input
  14.         cout<<"Please input an integer value\n";
  15.      }
  16.  
  17.     cin >> n;
  18.     cout << "You've entered " << n << '\n';
  19. }
Success #stdin #stdout 0s 2728KB
comments (?)
stdin
copy 
something that's not a number
42
stdout
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how many names do you want to register
Please input an integer value
You've entered 42
https://ideone.com/56hIU
language:
C++ (gcc 8.3)
created:
14 years ago
visibility:
public

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