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  1. #include <iostream>
  2. #include <string>
  3.  
  4. using namespace std;
  5.  
  6. int main()
  7. {
  8.   string value;
  9.   cin >> value;
  10.   int length = value.length();
  11.   for (int i = 0; i < length; i++)
  12.   {
  13.     while (!isdigit(value[i]))
  14.     {
  15.         cout << "zadan nesmysl, zadejte znovu: " << endl;
  16.         cin >> value;
  17.         length = value.length();
  18.         i = 0;
  19.     }
  20.   }
  21.   int intval = stoi(value);
  22.   cout << "Int hodnota je: " << intval << endl;
  23.   return 0;
  24. }
Success #stdin #stdout 0s 2988KB
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stdin
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123a a321 123465789a a123456789 123
stdout
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zadan nesmysl, zadejte znovu: 
zadan nesmysl, zadejte znovu: 
zadan nesmysl, zadejte znovu: 
zadan nesmysl, zadejte znovu: 
Int hodnota je: 123
https://ideone.com/YQz67B
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
secret

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