Mapping Numbers to Weekdays

Q.Write a C++ program to accept a number and display the corresponding number of week day

#include <iostream>
using namespace std;

int main() {
    int day;

    cout << "Enter a number (1-7) to display the corresponding weekday: ";
    cin >> day;

    switch(day) {
        case 1:
            cout << "The day is Sunday." << endl;
            break;
        case 2:
            cout << "The day is Monday." << endl;
            break;
        case 3:
            cout << "The day is Tuesday." << endl;
            break;
        case 4:
            cout << "The day is Wednesday." << endl;
            break;
        case 5:
            cout << "The day is Thursday." << endl;
            break;
        case 6:
            cout << "The day is Friday." << endl;
            break;
        case 7:
            cout << "The day is Saturday." << endl;
            break;
        default:
            cout << "Invalid Number! Please enter a number between 1 & 7." << endl;
            break;
    }

    return 0;
}

Output

 Enter a number (1-7) to display the corresponding weekday : 7
 The day is Saturday.

Determine the Weekday:

switch(day) {
    case 1:
        cout << "The day is Sunday." << endl;
        break;
    case 2:
        cout << "The day is Monday." << endl;
        break;
    case 3:
        cout << "The day is Tuesday." << endl;
        break;
    case 4:
        cout << "The day is Wednesday." << endl;
        break;
    case 5:
        cout << "The day is Thursday." << endl;
        break;
    case 6:
        cout << "The day is Friday." << endl;
        break;
    case 7:
        cout << "The day is Saturday." << endl;
        break;
    default:
        cout << "Invalid Number! Please enter a number between 1 & 7." << endl;
        break;
}

• We use a switch statement to match the input number to the corresponding day of the week.

• Each case represents a different day. For example, if the input is 1, the program outputs "The day is Sunday."

• The default case handles invalid input, ensuring the user knows they must enter a number between 1 and 7.

Explanation of the Output

• If the user inputs a number between 1 and 7, the program will match the number to the corresponding day of the week using a switch statement and print the day.

• If the user inputs a number outside the range of 1 to 7, the default case in the switch statement will be executed, displaying an error message.

This output mechanism ensures that the user is guided to enter a valid number for the days of the week and is informed when an invalid input is provided.