Telaryon

PI

Mar 6th, 2017
41
0
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C 0.23 KB | None | 0 0
  1. int main(){
  2.     double sum = 0;
  3.     int i;
  4.  
  5.     for(i = 1; i <= 1000; i++){
  6.         if(i % 2)
  7.             sum += 1.0/(i * 2-1);
  8.         else
  9.             sum -= 1.0/(i * 2-1);
  10.     }
  11.  
  12.     printf("%.2lf", sum*4);
  13.     return 0;
  14. }
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