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  1. #include <iostream>
  2. #include <limits>
  3. #include <assert.h>
  4.  
  5. using std::cout;
  6. using std::cin;
  7. using std::endl;
  8. using std::numeric_limits;
  9. using std::streamsize;
  10.  
  11. void SetRussianLocale() { setlocale(LC_ALL, "Russian"); }
  12.  
  13. void ClearCin() {
  14.   cin.clear();
  15.   cin.ignore(numeric_limits<streamsize>::max(), '\n');
  16. }
  17.  
  18. struct Range {
  19.   int from;
  20.   int to;
  21. };
  22.  
  23. bool IsValueInRange(int value, const Range &range) {
  24.   return value >= range.from && value <= range.to;
  25. }
  26.  
  27. bool IsValidRange(const Range &range) { return range.from < range.to; }
  28.  
  29. void AskUserValueInRange(const Range &range) {
  30.   assert(IsValidRange(range));
  31.   cout << "Введите число от " << range.from << " до " << range.to << endl;
  32. }
  33.  
  34. int GetIntegerValueInRangeFromUser(const Range &range) {
  35.   int value = range.from;
  36.   while (!(cin >> value) || !IsValueInRange(value, range)) {
  37.     AskUserValueInRange(range);
  38.     ClearCin();
  39.   }
  40.   return value;
  41. }
  42.  
  43. int main() {
  44.   SetRussianLocale();
  45.   const Range kDefaultRange{0, 99};
  46.   int value_one_ = GetIntegerValueInRangeFromUser(kDefaultRange);
  47.   int value_two_ = GetIntegerValueInRangeFromUser(kDefaultRange);
  48.   cout << "value_one_: " << value_one_ << " value_two_: " << value_two_;
  49. }
  50.  
Success #stdin #stdout 0s 3464KB
comments (?)
stdin
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10000
4
-10
42
stdout
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Введите число от 0 до 99
Введите число от 0 до 99
value_one_: 4 value_two_: 42
https://ideone.com/doWbBo
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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