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  1. #include <iostream>
  2. #include <limits>
  3. using namespace std;
  4.  
  5. int main()
  6. {
  7.   int num;
  8.  
  9.   // Get valid input
  10.   while( (cout << "Please enter a number: ") && !(cin >> num) )
  11.   {
  12.     cout << "Invalid number entered" << endl;
  13.     // Clear error state and flush any garbage input
  14.     cin.clear();
  15.     cin.ignore(numeric_limits<streamsize>::max(), '\n');
  16.   }
  17.  
  18.   // Echo back what we heard
  19.   cout << "You entered: " << num << "\n";
  20.  
  21.   cin.get();
  22. }
Success #stdin #stdout 0s 3464KB
comments (?)
stdin
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e48
eri
83
stdout
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Please enter a number: Invalid number entered
Please enter a number: Invalid number entered
Please enter a number: You entered: 83
https://ideone.com/UhgCCX
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
secret

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