fork download
copy 
  1. #include <iomanip>
  2. #include <cstdlib>
  3. #include <iostream>
  4. #include <cmath>
  5.  
  6. using namespace std;
  7.  
  8. int main(void)
  9. {
  10.     int i;
  11.     long double result;
  12.     long double pi;
  13.     int y=3;
  14.     int loopcount=0;
  15.     long double precision = 0;
  16.     long double previous = 0;
  17.  
  18.     cout<<"Start\n";
  19.  
  20.     result=1-(pow(1,y)/y);
  21.  
  22.     do
  23.     {
  24.         y=y+2;
  25.         result=result+(pow(1,y)/y);
  26.         y=y+2;
  27.         result=result-(pow(1,y)/y);
  28.  
  29.         pi=4*(result);
  30.         precision=(pi*(pow(10,11))/10);
  31.  
  32.         loopcount++;
  33.  
  34.         if (floor(precision)==floor(previous))
  35.             break;
  36.  
  37.         previous = precision;
  38.     }
  39.     while(true); //This is the problem!);
  40.  
  41.     cout<<"Final Arctan is:"<<endl;
  42.     cout<<setprecision(20)<<result<<endl;
  43.     cout<<"Final Pi is:"<<endl;
  44.     cout<<setprecision(9)<<pi<<endl;
  45.     cout<<"Times looped:"<<endl;
  46.     cout<<loopcount<<endl;
  47.  
  48.     return 0;
  49. }
  50.  
Success #stdin #stdout 0.02s 2724KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
Start
Final Arctan is:
0.78539640052495345225
Final Pi is:
3.1415856
Times looped:
70906
https://ideone.com/PYWpq
language:
C++ (gcc 8.3)
created:
12 years ago
visibility:
secret

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!