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  1. #include <stdio.h>
  2. #include <fenv.h>
  3. #pragma STDC FENV_ACCESS ON
  4.  
  5. int main(void)
  6. {
  7.     int roundMode = fegetround( );
  8.  
  9.     volatile double d1;
  10.     volatile double d2;
  11.     volatile double result;
  12.     volatile int rounded;
  13.  
  14.     fesetround(FE_TONEAREST);
  15.  
  16.     d1 = 0.41;
  17.     d2 = 100;
  18.     result = d1 * d2;
  19.     rounded = result;
  20.  
  21.     printf("nearest rounded=%i\n", rounded);
  22.  
  23.     fesetround(FE_TOWARDZERO);
  24.  
  25.     d1 = 0.41;
  26.     d2 = 100;
  27.     result = d1 * d2;
  28.     rounded = result;
  29.  
  30.     printf("zero rounded=%i\n", rounded);
  31.  
  32.     fesetround(roundMode);
  33.  
  34.     return 0;
  35. }
Success #stdin #stdout 0s 1832KB
comments (?)
stdin
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Standard input is empty
stdout
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nearest rounded=41
zero rounded=40
https://ideone.com/T2PpKX
language:
C (gcc 8.3)
created:
10 years ago
visibility:
public

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