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  1. #include <stdio.h>
  2. #include <math.h>
  3.  
  4. #define M_PI        3.14159265358979323846  /* pi */
  5.  
  6. int main() {
  7.  
  8.     long double a = M_PI;
  9.  
  10.     printf("%.20Lf\n", a);
  11.  
  12.     return 0;
  13. }
Success #stdin #stdout 0s 4568KB
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Standard input is empty
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3.14159265358979311600
https://ideone.com/TjrViT
language:
C (gcc 8.3)
created:
5 years ago
visibility:
public

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