Switch & Case statement in C++

The provided C++ code demonstrates the use of a switch-case statement to handle different user inputs.

Code

#include <iostream>
using namespace std;

/**
 * \brief Main function demonstrating the use of switch-case statement in C++.
 *
 * This program prompts the user to enter a number and then uses a switch-case
 * statement to print the corresponding word for numbers 1 to 5. For numbers 6
 * and 7, it prints "Six or Seven". For any other number, it prints "Invalid number".
 *
 * \return int Returns 0 upon successful execution.
 */
int main() {
    int number;  ///< Variable to store the user input number.
    cout << "Enter a number between 1-7: ";
    cin >> number;

    switch (number) {
        case 1:
            cout << "One" << endl;  ///< Prints "One" if the number is 1.
        break;
        case 2:
            cout << "Two" << endl;  ///< Prints "Two" if the number is 2.
        break;
        case 3:
            cout << "Three" << endl;  ///< Prints "Three" if the number is 3.
        break;
        case 4:
            cout << "Four" << endl;  ///< Prints "Four" if the number is 4.
        break;
        case 5:
            cout << "Five" << endl;  ///< Prints "Five" if the number is 5.
        break;
        case 6:
        case 7:
            cout << "Six or Seven" << endl;  ///< Prints "Six or Seven" if the number is 6 or 7.
        break;
        default:
            cout << "Invalid number" << endl;  ///< Prints "Invalid number" for any other number.
    }

    return 0;
}

Explanation

The provided C++ code demonstrates the use of a switch-case statement to handle different user inputs. The program begins by including the necessary header file <iostream> and using the std namespace to simplify the code.

#include <iostream>
using namespace std;

The main function is the entry point of the program. It starts by declaring an integer variable number to store the user’s input.

int main() {
    int number;
    cout << "Enter a number between 1-7: ";
    cin >> number;

The program then uses a switch-case statement to determine the output based on the value of number. Each case corresponds to a specific number, and the program prints the corresponding word for numbers 1 to 5. For example, if the user inputs 1, the program prints “One”.

switch (number) {
    case 1:
        cout << "One" << endl;
        break;
    case 2:
        cout << "Two" << endl;
        break;
    // ... other cases
}

For the numbers 6 and 7, the program prints “Six or Seven”. This is achieved by grouping these cases together without a break statement between them.

case 6:
case 7:
    cout << "Six or Seven" << endl;
    break;

If the user inputs any number outside the range of 1 to 7, the default case is executed, and the program prints “Invalid number”.

default:
    cout << "Invalid number" << endl;
}

Finally, the main function returns 0 to indicate successful execution.

return 0;
}

This code effectively demonstrates how to use a switch-case statement in C++ to handle multiple conditions based on user input.

Output

Enter a number between 1-7: 3
Three

Process finished with exit code 0