Switch statement in C++ - Mini Project: Build & Apply

Using a Switch Statement in C++

📖 Scenario: You are creating a simple program that tells the name of a day based on a number input from 1 to 7. Each number corresponds to a day of the week.

🎯 Goal: Build a program that uses a switch statement to print the correct day name for a given number.

📋 What You'll Learn

Create an integer variable called dayNumber with a value from 1 to 7

Create a switch statement that checks dayNumber

Use case labels for numbers 1 through 7, each printing the correct day name

Include a default case that prints "Invalid day number"

Print the day name or the invalid message as the final output

💡 Why This Matters

🌍 Real World

Switch statements are used in many programs to choose actions based on a value, like menu selections or commands.

💼 Career

Understanding switch statements helps in writing clear and efficient code for decision-making in software development.

1

Create the day number variable

Create an integer variable called dayNumber and set it to 3.

C++

// Create an integer variable called dayNumber and set it to 3
// Your code here

Need a hint?

Use int dayNumber = 3; to create the variable.

2

Start the switch statement

Write a switch statement that checks the variable dayNumber.

C++

int dayNumber = 3;

// Start a switch statement on dayNumber
// Your code here

Need a hint?

Use switch(dayNumber) { } to start the switch.

3

Add cases for days 1 to 7

Inside the switch(dayNumber), add case labels for numbers 1 to 7. For each case, write a cout << "Monday" << endl; statement to print the day name (e.g., "Monday" for 1). Add a break; after each print statement. Also add a default case that prints "Invalid day number". Make sure to include #include <iostream> and using namespace std; later.

C++

int dayNumber = 3;

switch(dayNumber) {
    // Add cases 1 to 7 with cout and break
    // Add default case with cout
    // Your code here
}

Need a hint?

Each case should print the correct day with cout << "Day" << endl; and end with break;. The default prints the invalid message.

4

Run the program to see the output

Add the necessary includes, namespace, and main function to run the program. The output should be Wednesday.

C++

#include 
using namespace std;

int main() {
    int dayNumber = 3;

    switch(dayNumber) {
        case 1:
            cout << "Monday" << endl;
            break;
        case 2:
            cout << "Tuesday" << endl;
            break;
        case 3:
            cout << "Wednesday" << endl;
            break;
        case 4:
            cout << "Thursday" << endl;
            break;
        case 5:
            cout << "Friday" << endl;
            break;
        case 6:
            cout << "Saturday" << endl;
            break;
        case 7:
            cout << "Sunday" << endl;
            break;
        default:
            cout << "Invalid day number" << endl;
    }

    // Run the program
    return 0;
}

Need a hint?

Ensure #include <iostream> and using namespace std; are at the top, and return 0; at the end of main().