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Satvik-Singh192Satvik-Singh192
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feat: implemented unit converter
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‎Src/Unit_converter/unit_converter.cpp‎

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#include <iostream>
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#include <limits>
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#include <iomanip>
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#include <cmath>
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using namespace std;
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void clearInput() {
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cin.clear();
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cin.ignore(numeric_limits<streamsize>::max(), '\n');
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}
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double getNumber(const string &prompt) {
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double x;
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while (true) {
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cout << prompt;
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if (cin >> x) {
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clearInput();
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return x;
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}
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cout << "Invalid number. Try again.\n";
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clearInput();
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}
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}
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int getIntInRange(const string &prompt, int lo, int hi) {
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int c;
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while (true) {
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cout << prompt;
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if (cin >> c) {
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clearInput();
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if (c >= lo && c <= hi) return c;
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cout << "Choice out of range (" << lo << " - " << hi << "). Try again.\n";
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} else {
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cout << "Invalid input. Enter a number.\n";
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clearInput();
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}
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}
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}
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namespace conv {
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double metersToKilometers(double m) { return m / 1000.0; }
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double kilometersToMeters(double km) { return km * 1000.0; }
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double metersToMiles(double m) { return m / 1609.344; }
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double milesToMeters(double mi) { return mi * 1609.344; }
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double feetToMeters(double ft) { return ft * 0.3048; }
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double metersToFeet(double m) { return m / 0.3048; }
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double cToF(double c) { return (c * 9.0/5.0) + 32.0; }
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double fToC(double f) { return (f - 32.0) * 5.0/9.0; }
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double cToK(double c) { return c + 273.15; }
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double kToC(double k) { return k - 273.15; }
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double gramsToKilograms(double g) { return g / 1000.0; }
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double kilogramsToGrams(double kg) { return kg * 1000.0; }
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double kilogramsToPounds(double kg) { return kg * 2.2046226218; }
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double poundsToKilograms(double lb) { return lb / 2.2046226218; }
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double litersToMilliliters(double L) { return L * 1000.0; }
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double millilitersToLiters(double mL) { return mL / 1000.0; }
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double litersToGallons(double L) { return L * 0.2641720524; }
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double gallonsToLiters(double gal) { return gal / 0.2641720524; }
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}
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void pressEnterToContinue() {
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cout << "\nPress ENTER to continue...";
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cin.get();
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}
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void lengthMenu() {
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while (true) {
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cout << "\n--- Length Converter ---\n";
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cout << "1) Meters → Kilometers\n";
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cout << "2) Kilometers → Meters\n";
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cout << "3) Meters → Miles\n";
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cout << "4) Miles → Meters\n";
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cout << "5) Feet → Meters\n";
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cout << "6) Meters → Feet\n";
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cout << "7) Back to Main Menu\n";
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int ch = getIntInRange("Choose (1-7): ", 1, 7);
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if (ch == 7) return;
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double v = getNumber("Enter value: ");
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cout << fixed << setprecision(6);
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switch (ch) {
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case 1: cout << v << " m = " << conv::metersToKilometers(v) << " km\n"; break;
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case 2: cout << v << " km = " << conv::kilometersToMeters(v) << " m\n"; break;
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case 3: cout << v << " m = " << conv::metersToMiles(v) << " miles\n"; break;
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case 4: cout << v << " miles = " << conv::milesToMeters(v) << " m\n"; break;
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case 5: cout << v << " ft = " << conv::feetToMeters(v) << " m\n"; break;
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case 6: cout << v << " m = " << conv::metersToFeet(v) << " ft\n"; break;
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}
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pressEnterToContinue();
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}
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}
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void temperatureMenu() {
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while (true) {
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cout << "\n--- Temperature Converter ---\n";
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cout << "1) Celsius → Fahrenheit\n";
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cout << "2) Fahrenheit → Celsius\n";
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cout << "3) Celsius → Kelvin\n";
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cout << "4) Kelvin → Celsius\n";
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cout << "5) Back to Main Menu\n";
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int ch = getIntInRange("Choose (1-5): ", 1, 5);
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if (ch == 5) return;
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double v = getNumber("Enter value: ");
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cout << fixed << setprecision(4);
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switch (ch) {
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case 1: cout << v << " °C = " << conv::cToF(v) << " °F\n"; break;
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case 2: cout << v << " °F = " << conv::fToC(v) << " °C\n"; break;
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case 3: cout << v << " °C = " << conv::cToK(v) << " K\n"; break;
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case 4: cout << v << " K = " << conv::kToC(v) << " °C\n"; break;
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}
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pressEnterToContinue();
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}
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}
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void weightMenu() {
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while (true) {
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cout << "\n--- Weight Converter ---\n";
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cout << "1) Grams → Kilograms\n";
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cout << "2) Kilograms → Grams\n";
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cout << "3) Kilograms → Pounds\n";
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cout << "4) Pounds → Kilograms\n";
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cout << "5) Back to Main Menu\n";
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int ch = getIntInRange("Choose (1-5): ", 1, 5);
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if (ch == 5) return;
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double v = getNumber("Enter value: ");
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cout << fixed << setprecision(6);
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switch (ch) {
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case 1: cout << v << " g = " << conv::gramsToKilograms(v) << " kg\n"; break;
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case 2: cout << v << " kg = " << conv::kilogramsToGrams(v) << " g\n"; break;
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case 3: cout << v << " kg = " << conv::kilogramsToPounds(v) << " lb\n"; break;
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case 4: cout << v << " lb = " << conv::poundsToKilograms(v) << " kg\n"; break;
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}
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pressEnterToContinue();
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}
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}
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void volumeMenu() {
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while (true) {
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cout << "\n--- Volume Converter ---\n";
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cout << "1) Liters → Milliliters\n";
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cout << "2) Milliliters → Liters\n";
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cout << "3) Liters → Gallons (US)\n";
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cout << "4) Gallons (US) → Liters\n";
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cout << "5) Back to Main Menu\n";
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int ch = getIntInRange("Choose (1-5): ", 1, 5);
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if (ch == 5) return;
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double v = getNumber("Enter value: ");
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cout << fixed << setprecision(6);
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switch (ch) {
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case 1: cout << v << " L = " << conv::litersToMilliliters(v) << " mL\n"; break;
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case 2: cout << v << " mL = " << conv::millilitersToLiters(v) << " L\n"; break;
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case 3: cout << v << " L = " << conv::litersToGallons(v) << " gal\n"; break;
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case 4: cout << v << " gal = " << conv::gallonsToLiters(v) << " L\n"; break;
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}
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pressEnterToContinue();
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}
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}
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// --- Main ---
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void printMainMenu() {
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cout << "\n=============================\n";
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cout << " UNIT CONVERTER\n";
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cout << "=============================\n";
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cout << "1) Length\n";
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cout << "2) Temperature\n";
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cout << "3) Weight\n";
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cout << "4) Volume\n";
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cout << "5) Exit\n";
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}
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int main() {
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cout << "Simple Unit Converter (console)\n";
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while (true) {
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printMainMenu();
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int ch = getIntInRange("Choose (1-5): ", 1, 5);
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switch (ch) {
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case 1: lengthMenu(); break;
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case 2: temperatureMenu(); break;
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case 3: weightMenu(); break;
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case 4: volumeMenu(); break;
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case 5:
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cout << "Goodbye!\n";
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return 0;
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}
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}
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return 0;
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}

‎Src/Unit_converter/unit_converter.exe‎

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