TP-tut5-zad4

#include <iostream>
#include <cmath>
#include <algorithm>

using namespace std;
double TrapeznoPravilo (double f(double ), int a, int b, int n)  {
    double suma=0;
    for (int i=1; i<n; i++) {
            suma+=f(a+((b-a)/n)*i);
    }
    suma+=(1/2)*(f(a)+f(b));
    return suma*(b-a)/n;
}
int main () {
    cout<<"Rezultat funkcije: "<<TrapeznoPravilo( [] (double x) { return x*x*x; },0,10,5);
    return 0;
}