📌 Enumeration Examples in C++

An Enumeration (enum) in C++ is a user-defined data type that assigns meaningful names to a set of integer constants.

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1️⃣ Direction Example in C++

📌 Using enum to define directions.

#include <iostream>
using namespace std;

enum Direction { NORTH, SOUTH, EAST, WEST };

void showDirection(Direction d) {
    switch (d) {
        case NORTH: cout << "You are moving NORTH." << endl; break;
        case SOUTH: cout << "You are moving SOUTH." << endl; break;
        case EAST:  cout << "You are moving EAST." << endl; break;
        case WEST:  cout << "You are moving WEST." << endl; break;
        default:    cout << "Invalid direction." << endl;
    }
}

int main() {
    Direction dir;
    int choice;

    cout << "Enter direction (0-NORTH, 1-SOUTH, 2-EAST, 3-WEST): ";
    cin >> choice;

    if (choice >= 0 && choice <= 3) {
        dir = static_cast<Direction>(choice);
        showDirection(dir);
    } else {
        cout << "Invalid input!" << endl;
    }

    return 0;
}

🔹 Output

Enter direction (0-NORTH, 1-SOUTH, 2-EAST, 3-WEST): 2
You are moving EAST.

📌 Key Points:
✔ enum Direction creates meaningful constants (NORTH = 0, SOUTH = 1, etc.).
✔ switch statement is used to print the selected direction.
✔ static_cast<Direction>(choice) converts integer input to an enum type.

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2️⃣ Week Days Example in C++

📌 Using enum to represent days of the week.

#include <iostream>
using namespace std;

enum WeekDays { SUNDAY, MONDAY, TUESDAY, WEDNESDAY, THURSDAY, FRIDAY, SATURDAY };

void showDay(WeekDays day) {
    switch (day) {
        case SUNDAY:    cout << "It's Sunday, time to relax!" << endl; break;
        case MONDAY:    cout << "It's Monday, back to work!" << endl; break;
        case TUESDAY:   cout << "It's Tuesday, keep going!" << endl; break;
        case WEDNESDAY: cout << "It's Wednesday, halfway there!" << endl; break;
        case THURSDAY:  cout << "It's Thursday, almost the weekend!" << endl; break;
        case FRIDAY:    cout << "It's Friday, weekend is near!" << endl; break;
        case SATURDAY:  cout << "It's Saturday, enjoy your day!" << endl; break;
        default:        cout << "Invalid day!" << endl;
    }
}

int main() {
    WeekDays today;
    int choice;

    cout << "Enter day (0-SUNDAY, 1-MONDAY, ..., 6-SATURDAY): ";
    cin >> choice;

    if (choice >= 0 && choice <= 6) {
        today = static_cast<WeekDays>(choice);
        showDay(today);
    } else {
        cout << "Invalid input!" << endl;
    }

    return 0;
}

🔹 Output

Enter day (0-SUNDAY, 1-MONDAY, ..., 6-SATURDAY): 5
It's Friday, weekend is near!

📌 Key Points:
✔ enum WeekDays represents each day with a unique integer value (SUNDAY = 0, MONDAY = 1, etc.).
✔ The user selects a day by entering a number from 0 to 6.
✔ The program prints a custom message based on the selected day.

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📌 Summary

✔ Enums improve readability by replacing integer values with meaningful names.
✔ They are strongly typed, preventing accidental invalid assignments.
✔ Enums can be used in switch statements for clear, structured logic.

🚀 Want more examples? Let me know! 🔥