Use cases - Mini Project: Build & Apply

Use Cases in C Programming

📖 Scenario: You are building a simple program to decide what message to show based on a user's role in a system.

🎯 Goal: Create a C program that uses switch statements to print different messages for different user roles.

📋 What You'll Learn

Create an integer variable called role with a specific value

Create a switch statement using the variable role

Handle cases for roles 1, 2, and 3 with different messages

Include a default case for unknown roles

Print the message corresponding to the role

💡 Why This Matters

🌍 Real World

Switch statements are used in programs to make decisions based on different conditions, like user roles, menu choices, or error codes.

💼 Career

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

1

Create the role variable

Create an integer variable called role and set it to 2.

C

# Create an integer variable called role and set it to 2
// Your code here

Need a hint?

Use int role = 2; inside the main function.

2

Add the switch statement

Add a switch statement using the variable role inside the main function.

C

#include 

int main() {
    int role = 2;
    // Add a switch statement using role
    // Your code here
    return 0;
}

Need a hint?

Write switch(role) { } inside main.

3

Add cases for roles 1, 2, and 3

Inside the switch(role), add cases for 1, 2, and 3. For each case, add a printf statement with these exact messages:
"Admin access granted\n" for case 1,
"User access granted\n" for case 2,
"Guest access granted\n" for case 3.
Don't forget to add break; after each printf.

C

#include 

int main() {
    int role = 2;
    switch(role) {
        // Add cases 1, 2, 3 with printf and break
        // Your code here
    }
    return 0;
}

Need a hint?

Use case 1:, case 2:, case 3: with printf and break;.

4

Add a default case and print the message

Add a default case inside the switch(role) that prints "Unknown role\n". Then, add a printf statement to print the message for the current role when the program runs.

C

#include 

int main() {
    int role = 2;
    switch(role) {
        case 1:
            printf("Admin access granted\n");
            break;
        case 2:
            printf("User access granted\n");
            break;
        case 3:
            printf("Guest access granted\n");
            break;
        // Add default case here
        // Your code here
    }
    return 0;
}

Need a hint?

Use default: with printf("Unknown role\n"); and break;.