#include <iostream>
#include <cmath>
#include <fstream>

int main() {
    std::ofstream file("cosh_data.txt");
    double x_start = -5.0, x_end = 5.0, step = 0.1;
    for (double x = x_start; x <= x_end; x += step) {
        file << x << " " << cosh(x) << std::endl;
    }
    file.close();
    std::cout << "Data written to cosh_data.txt" << std::endl;
    return 0;
}