fork download
copy 
  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
  13. double prostokaty(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 += dx * f(x);
  22.         x += dx;
  23.     }
  24.  
  25.     return s;
  26. }
  27.  
  28. int main()
  29. {
  30.     double a1 = 0.0, b1 = 3.14;
  31.     int n1 = 10;
  32.  
  33.     double a2 = 0.0, b2 = 3.14;
  34.     int n2 = 100;
  35.  
  36.     double s1 = prostokaty(a1, b1, n1);
  37.     double s2 = prostokaty(a2, b2, n2);
  38.  
  39.     cout << "s1 (n=10)  = " << s1 << endl;
  40.     cout << "s2 (n=100) = " << s2 << endl;
  41.  
  42.     return 0;
  43. }
  44.  
Success #stdin #stdout 0.01s 5324KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
s1 (n=10)  = 1.98329
s2 (n=100) = 1.99981
https://ideone.com/TMQBbO
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

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!