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  1. #include <stdio.h>
  2. #include <math.h>
  3.  
  4. double round(double value, int digits)
  5. {
  6.    double factor = pow(10.0, ceil(log10(fabs(value))) + digits);
  7.    value *= factor ;
  8.    value = value >= 0.0 ? floor(value + 0.5) : ceil(value - 0.5);
  9.    return value / factor;   
  10. }
  11.  
  12.  
  13. int main(void) {
  14.  
  15.         printf("%.52g", round(-123.23344553, 6));
  16.     return 0;
  17. }
Success #stdin #stdout 0.01s 1720KB
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stdin
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Standard input is empty
stdout
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-123.2334455299999973476587911136448383331298828125
https://ideone.com/6dskEv
language:
C (gcc 8.3)
created:
11 years ago
visibility:
secret

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