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  1. #include <iostream>
  2. #include <cmath>
  3.  
  4. using namespace std;
  5.  
  6. // funkcja f(x)
  7. double f(double x)
  8. {
  9.     return sin(x);
  10. }
  11.  
  12. // metoda prostokątów (lewe prostokąty)
  13. double metodaProstokatow(double a, double b, int n)
  14. {
  15.     double dx = (b - a) / n;
  16.     double x = a;
  17.     double S = 0.0;
  18.  
  19.     for (int i = 1; i <= n; i++)
  20.     {
  21.         S += dx * f(x);
  22.         x += dx;
  23.     }
  24.  
  25.     return S;
  26. }
  27.  
  28. int main()
  29. {
  30.     double a = 1.0;
  31.     double b = 3.0;
  32.  
  33.     int N1 = 10;
  34.     int N2 = 100;
  35.  
  36.     double S1 = metodaProstokatow(a, b, N1);
  37.     double S2 = metodaProstokatow(a, b, N2);
  38.  
  39.     cout << "f(x) = sin(x)" << endl;
  40.     cout << "Przedzial [1, 3]" << endl;
  41.  
  42.     cout << "N1 = " << N1 << "  S1 = " << S1 << endl;
  43.     cout << "N2 = " << N2 << "  S2 = " << S2 << endl;
  44.  
  45.     return 0;
  46. }
  47.  
Success #stdin #stdout 0.01s 5276KB
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Standard input is empty
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f(x) = sin(x)
Przedzial [1, 3]
N1 = 10  S1 = 1.59523
N2 = 100  S2 = 1.53725
https://ideone.com/b85lFP
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

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