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Task 2

realanton12345 Jan 18th, 2019 54 Never
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  1. #include <iostream>
  2. #include <stdlib.h>
  3. #include <iomanip>
  4. #include <cmath>
  5.  
  6. using namespace std;
  7.  
  8.  
  9. double countY(double x) {
  10.     //return (M_PI * pow(x, 3)) / 2;
  11.     return sin(x);
  12.     //return pow(9, x);
  13. }
  14.  
  15. double factorial(int n)
  16. {
  17.     if(n > 1) {
  18.         return n * factorial(n - 1);
  19.     }
  20.     else {
  21.         return 1;
  22.     }
  23. }
  24.  
  25. double countS(double x, double eps, int *times) {
  26.     double i = x;
  27.     double a = x;
  28.     double sum = x;
  29.     *times = 1;
  30.     while (fabs(i) > eps) {
  31.         i =  pow(x, 2)/(2 * (*times) *(2 * (*times) + 1));
  32.         //i = ((pow(-1, *times + 1) / *times) + ((pow(-1, *times) * 6) / (pow(*times, 3) * pow(M_PI, 2)))) * sin(*times) * M_PI * x;
  33.         //i = (pow(log(9), *times) / factorial(*times)) * pow (x, *times);
  34.         a *= -1 * i;
  35.         sum += a;
  36.         *times = *times + 1;
  37.     }
  38.     return sum;
  39. }
  40.  
  41. int main()
  42. {
  43.     cout << "LR 3" << endl;
  44.  
  45.     double a = -0.5;
  46.     double b = 0.5;
  47.     double h = (b - a) / 10;
  48.     double x = a;
  49.     double e = 0.001;
  50.  
  51.  
  52.     cout << "a = " << a << ", b = " << b << ", h = " << h << ", x = " << a << endl;
  53.  
  54.     cout << setw(5) << "X" << setw(15) << "Y(X)" << setw(15) << "S(X)" << setw(15) << "S times" << setw(15) << "Y times" << endl;
  55.     while (x < (b + h) / 2) {
  56.         int *times = new int (0);
  57.         double s = countS(x, e, times);
  58.         cout << fixed << setw(5) << x << setw(15) << countY(x) << setw(15) << s << setw(15) << *times << setw(15) << "1" << endl;
  59.         x += h;
  60.     }
  61.     system("pause");
  62. }
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