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  1. #include <iostream>
  2.  
  3. int main()
  4. {
  5.     double tmp = 1.;
  6.     double eps;
  7.     int i = 0;
  8.     while(tmp != 0) {
  9.         ++i;
  10.         eps = tmp;
  11.         tmp /= 2.;
  12.     }
  13.     if(eps == 0) {
  14.         std::cout << "(1)eps is zero!\n";
  15.     }
  16.     std::cout << "eps before: " << eps;
  17.     if(eps == 0) {
  18.         std::cout << "(2)eps is zero!\n";
  19.         std::cout << "after " << i << " steps\n";
  20.     }
  21.  if (eps != 0)
  22.     while(eps < 1.) {
  23.         tmp = eps;
  24.         eps *= 2.;
  25.         if(tmp == eps) {
  26.             printf("wtf?\n");
  27.         }
  28.     }
  29.  
  30.     std::cout << "eps after: " << eps;
  31. }
  32.  
Success #stdin #stdout 0.02s 2680KB
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stdin
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Standard input is empty
stdout
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eps before: 0(2)eps is zero!
after 16446 steps
eps after: 0
https://ideone.com/HM472Q
language:
C++ (gcc 8.3)
created:
11 years ago
visibility:
public

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