Register storage class - Mini Project: Build & Apply

Using the Register Storage Class in C

📖 Scenario: You are writing a small C program to count how many times a button is pressed. To make the counting faster, you want to use the register storage class for the counter variable.

🎯 Goal: Build a C program that uses a register variable to count button presses in a loop and then prints the total count.

📋 What You'll Learn

Create a register variable to count button presses

Use a for loop to simulate 10 button presses

Increment the register variable inside the loop

Print the final count after the loop

💡 Why This Matters

🌍 Real World

Counting events quickly is common in embedded systems like button presses or sensor readings.

💼 Career

Understanding storage classes helps optimize programs for speed and memory, useful in systems programming and embedded development.

1

Create a register variable for counting

Write a line to declare a register variable called count and initialize it to 0.

C

# Declare a register variable called count and set it to 0
// Your code here

Need a hint?

Use the keyword register before the type int and name the variable count.

2

Set up a loop to simulate button presses

Add a for loop that runs from i = 0 to i < 10 to simulate 10 button presses. Declare int i inside the loop header.

C

#include 

int main() {
    register int count = 0;
    // Add a for loop with int i from 0 to less than 10
    // Your code here
    return 0;
}

Need a hint?

Use for (int i = 0; i < 10; i++) to loop 10 times.

3

Increment the register variable inside the loop

Inside the for loop, add a line to increase the value of count by 1 each time.

C

#include 

int main() {
    register int count = 0;
    for (int i = 0; i < 10; i++) {
        // Increase count by 1
        // Your code here
    }
    return 0;
}

Need a hint?

Use count++; to add one to count.

4

Print the final count

After the loop, write a line to print the text "Button pressed: " followed by the value of count using printf.

C

#include 

int main() {
    register int count = 0;
    for (int i = 0; i < 10; i++) {
        count++;
    }
    // Print the count with message
    // Your code here
    return 0;
}

Need a hint?

Use printf("Button pressed: %d\n", count); to show the count.