/**
 * This program outputs an ASCII-Table using only std::cout, std::cin and input/output manipulators.
 */

#include <iostream>
#include <limits>
#include <iomanip>
#include <string>

const int CHAR_WIDTH = 5;
const int DEC_WIDTH = 4;
const int HEX_WIDTH = 4;
const int OCT_WIDTH = 4;

int getIntInRangeFromInput(std::string message, int start, int end) {
    int value = 0;
    bool valueIsValid = false;
    while (!valueIsValid) {
        std::cout << message;
        std::cin >> value;

        if (value < start || value > end) {
            std::cout << "Please enter a valid value." << std::endl;
            valueIsValid = false;
        } else {
            valueIsValid = true;
        }

        std::cin.clear();
        std::cin.ignore(std::numeric_limits<std::streamsize>::max(), '\n');
    }
    return value;
}

void printTableDivider() {
    std::cout << std::setfill('-')
              << "|"
              << std::setw(CHAR_WIDTH)
              << ""
              << std::setw(1)
              << "|"
              << std::setw(DEC_WIDTH)
              << ""
              << std::setw(1)
              << "|"
              << std::setw(HEX_WIDTH)
              << ""
              << std::setw(1)
              << "|"
              << std::setw(OCT_WIDTH)
              << ""
              << std::setw(1)
              << "|"
              << std::endl;
}

void printTableHeader() {
    std::cout << std::setfill(' ')
              << " "
              << std::left
              << std::setw(CHAR_WIDTH)
              << "CHAR"
              << std::setw(1)
              << " "
              << std::right
              << std::setw(DEC_WIDTH)
              << "DEC"
              << std::setw(1)
              << " "
              << std::left
              << std::setw(HEX_WIDTH)
              << "HEX"
              << std::setw(1)
              << " "
              << std::left
              << std::setw(OCT_WIDTH)
              << "OCT"
              << std::endl;
}

int main(int argc, char *argv[]) {
    int startValue = getIntInRangeFromInput("Enter ASCII Table Begin [32..255]: ", 32, 255);
    int endValue = getIntInRangeFromInput("Enter ASCII Table End [110..255]: ", 110, 255);

    printTableHeader();
    printTableDivider();
    for (int i = startValue; i <= endValue; i++) {
        std::cout << std::setfill(' ')
                << std::setw(1)
                  << "| '"
                  << std::left
                  << std::setw(1)
                  << (char) i
                  << std::setw(1)
                  << "' |"
                  << std::right
                  << std::setw(DEC_WIDTH)
                  << std::dec
                  << i
                  << std::setw(1)
                  << "|0x"
                  << std::left
                  << std::setw(HEX_WIDTH-2)
                  << std::hex
                  << i
                  << std::setw(1)
                  << "|0"
                  << std::left
                  << std::setw(OCT_WIDTH-1)
                  << std::oct
                  << i
                  << std::setw(1)
                  << "|"
                  << std::endl;
        printTableDivider();
    }

    return 0;
}