#include <iostream>

int i;
double sum(int &i, int lo, int hi, double (*term)()) {
    double temp = 0;
    for (i = lo; i <= hi; i++)
        temp += term();
    return temp;
}

double term_func() { return 1.0 / i; }

int main () {
    std::cout << sum(i, 1, 100, term_func) << std::endl;
    return 0;
}