code. compile. run. debug. share.
#include <iostream>
#include <cstdlib>
#include <cmath>
double degrees2radians(double x)
{
return x * 3.14159 / 180;
}
double f1(double x)
{
x = degrees2radians(x);
return sin(x);
}
double rectangle_method(double a, double b, int n)
{
float h, integral = 0;
h = (a - b) / (double) n;
for (int i=1; i<=n; i++)
integral += f1(b + i*h)*h;
return integral;
}
int main()
{
std::cout << rectangle_method(1, -2, 3) << "\n";
return 0;
}
Compiling Program...
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