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  1. #include <iostream>
  2. #include <cmath>
  3.  
  4. using namespace std;
  5.  
  6. // Funkcja f(x) = sin(x)
  7. double f(double x)
  8. {
  9.     return sin(x);
  10. }
  11.  
  12. // Metoda prostokątów (lewych)
  13. double metodaProstokatow(double a, double b, int n)
  14. {
  15.     double dx = (b - a) / n;
  16.     double s = 0.0;
  17.     double x = a;
  18.  
  19.     for (int i = 1; i <= n; i++)
  20.     {
  21.         s = s + dx * f(x);
  22.         x = x + dx;
  23.     }
  24.  
  25.     return s;
  26. }
  27.  
  28. int main()
  29. {
  30.     double A1 = 0.0;
  31.     double B1 = 3.14;
  32.     int N1 = 10;
  33.  
  34.     double a2 = 0.0;
  35.     double b2 = 3.14;
  36.     int N2 = 100;
  37.  
  38.     double s1 = metodaProstokatow(A1, B1, N1);
  39.     double s2 = metodaProstokatow(a2, b2, N2);
  40.  
  41.     cout << "Wynik dla N1 = 10:  " << s1 << endl;
  42.     cout << "Wynik dla N2 = 100: " << s2 << endl;
  43.  
  44.     return 0;
  45. }
  46.  
Success #stdin #stdout 0.01s 5308KB
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stdin
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Standard input is empty
stdout
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Wynik dla N1 = 10:  1.98329
Wynik dla N2 = 100: 1.99981
https://ideone.com/COmpgL
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

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