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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. #include <cmath>
  5. #include <iomanip>
  6.  
  7. class Four
  8. {
  9. private:
  10.     int inputedAccuracy;
  11.     double pi;
  12.     double denominator;
  13.     int doneTermCounter;
  14.     double oneTerm;
  15.     int negativeController;
  16.  
  17. public:
  18.     double question4()
  19.     {
  20.         cout << "Accuracy set at : " ;
  21.         cin >> inputedAccuracy;
  22.         cout << endl;
  23.         pi = 0.0;
  24.         denominator = 1.0;
  25.         doneTermCounter = 0;
  26.  
  27.         negativeController = 1;
  28.         cout << "Term" << "            " << "pi" << endl;
  29.         cout << "1  " << "             " << "4" << endl;
  30.  
  31.  
  32.         for (inputedAccuracy; inputedAccuracy > 0; inputedAccuracy -= 100)
  33.         {
  34.             for (int doneTerm = 0; doneTerm < 100; doneTerm++)
  35.             {
  36.                 pi = pi + (negativeController * 4 / denominator);
  37.                 negativeController *= -1;
  38.                 denominator += 2;
  39.                 doneTermCounter++;
  40.             }
  41.             if (doneTermCounter >= 10000)
  42.                 cout << doneTermCounter << "             " << pi << endl;
  43.             else
  44.                 if (doneTermCounter >= 1000)
  45.                     cout << doneTermCounter << "            " << pi << endl;
  46.                 else
  47.                     cout << doneTermCounter << "             " << pi << endl;
  48.         }
  49.         return 0.0;
  50.     }
  51. };
  52.  
  53. int main()
  54. {
  55. Four f;
  56.  
  57. f.question4();
  58.  
  59. }
Success #stdin #stdout 0s 3300KB
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stdin
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stdout
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Accuracy set at : 
Term            pi
1               4
100             3.13159
200             3.13659
300             3.13826
400             3.13909
500             3.13959
600             3.13993
700             3.14016
800             3.14034
900             3.14048
1000            3.14059
1100            3.14068
1200            3.14076
https://ideone.com/6GNVw2
language:
C++ (gcc 8.3)
created:
10 years ago
visibility:
public

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