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rozpoznani celeho nebo realneho cisla

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Mar 31st, 2020
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C++ 0.36 KB | None | 0 0
  1. #include <iostream>
  2. #include <limits>
  3. #include <cmath>
  4.  
  5. int main()
  6. {
  7.   double d;
  8.   if (std::cin >> d) {
  9.     if (fabs(d - int64_t(d)) < std::numeric_limits<double>::epsilon()*fabs(2*d)) {
  10.       std::cout << d << " je cele cislo\n";
  11.     } else {
  12.       std::cout << d << " je realne cislo\n";
  13.     }
  14.   } else {
  15.     std::cout << "Nebylo zadano cislo\n";
  16.   }
  17. }
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