втора задача от второ домашно КН

#include <iostream>
#include<thread>
#include<chrono>

const char _LEFT_SYMB = '<';
const char _RIGHT_SYMB = '>';
const char _DEF_FILL = '#';
const char _DEF_EMPTY = '-';
const int _MAX_LEN = 1026;
const int _LENGHT = 100;

void initBar(char* bar, int len, char left, char right, char fill) {
    bar[0] = left;
    bar[len] = right;
    for (int i = 0; i < len - 1; i++)
        bar[i] = fill;
}

void printBar(char* bar, int len, int speed, char left, char right, bool perc = false) {
    std::cout << left;
    int info = 0;
    auto start = std::chrono::steady_clock::now();
    for (int i = 1; i < len - 1; i++) {
        std::cout << bar[i];
        std::this_thread::sleep_for(std::chrono::milliseconds(speed));
        if (bar[i] == _DEF_FILL && bar[i + 1] == _DEF_EMPTY) {
            if (perc) {
                int res = ceill((float)(i) / (float)(len - 1) * 100);
                std::cout << res << "%";
            }
            auto end = std::chrono::steady_clock::now();
            info = std::chrono::duration_cast<std::chrono::seconds>(end - start).count();
        }
    }
    std::cout << right;
    std::cout << "\nExecution time: " << info << " second(s)";
}

void fillBar(char* bar, int border, char fill) {
    for (int i = 1; i < border+1; i++)
        bar[i] = fill;
}

void drawBar(char* bar, float currentProgress,int speed, bool perc = false, int length = 100, char leftSymb = _LEFT_SYMB, char rightSymb = _RIGHT_SYMB, char fillSymb = _DEF_FILL, char emptySymb = _DEF_EMPTY) {
    if (currentProgress > 1 || currentProgress < 0)
        std::cout << "Can't display more than 100%";
    else if (length > 1024)
        std::cout << "Can't display such bar.";
    else {
        length += 2;
        initBar(bar, length, leftSymb, rightSymb, emptySymb);

        float borderF = (length - 2) * currentProgress;

        int border = borderF;

        fillBar(bar, border, fillSymb);

        printBar(bar, length, speed, leftSymb, rightSymb, perc);
    }
}

void validate(int& number) {
    bool errorMessage = false;

    do {
        if (errorMessage)
            std::cout << "Bad input. Please try again.";

        std::cin >> number;

        bool validateCharInput = !((bool)(std::cin));
        if (validateCharInput) {
            std::cout << "No symbols allowed\n";
            std::cin.clear();
            std::cin.ignore(255, '\n');
        }

        errorMessage = true;
    } while (number <= 0);
}

int main() {
    int seconds = 0;
    char bar[_MAX_LEN];

    std::cout << "Enter seconds: ";
    validate(seconds);
    const float percentage = 0.74;
    float speed = 10*((float)seconds / percentage);
    //speed *= 10;
    drawBar(bar, percentage, (int)speed, true, _LENGHT);
}