Format specifiers - Mini Project: Build & Apply

Format Specifiers in C

📖 Scenario: You are creating a simple program to display different types of data about a product in a store. You will learn how to use format specifiers to print integers, floating-point numbers, and characters correctly.

🎯 Goal: Build a C program that stores product details and prints them using the correct format specifiers.

📋 What You'll Learn

Create variables with exact names and values

Use correct format specifiers for each variable type

Print the output exactly as instructed

💡 Why This Matters

🌍 Real World

Format specifiers are used in many programs to display data clearly, such as showing prices, IDs, or grades in reports or user interfaces.

💼 Career

Understanding format specifiers is essential for C programming jobs, especially in systems programming, embedded systems, and any application that requires formatted text output.

1

Create product data variables

Create three variables with these exact names and values: product_id as integer 101, price as float 29.99, and grade as character 'A'.

C

# Create variables product_id, price, and grade with given values
// Your code here

Need a hint?

Use int for whole numbers, float for decimal numbers, and char for single characters.

2

Add a format string variable

Create a variable called format_str of type char* and set it to the string "ID: %d, Price: %.2f, Grade: %c".

C

int product_id = 101;
float price = 29.99f;
char grade = 'A';
// Create format_str with the exact format string
// Your code here

Need a hint?

Use char* to store a string and include the exact format specifiers for integer, float with 2 decimals, and character.

3

Print product details using format specifiers

Write a printf statement using format_str to print product_id, price, and grade in that order.

C

int product_id = 101;
float price = 29.99f;
char grade = 'A';
char* format_str = "ID: %d, Price: %.2f, Grade: %c";
// Print the product details using printf and format_str
// Your code here

Need a hint?

Use printf with the format string and variables in the correct order.

4

Display the output

Run the program and print the output exactly as: ID: 101, Price: 29.99, Grade: A

C

int product_id = 101;
float price = 29.99f;
char grade = 'A';
char* format_str = "ID: %d, Price: %.2f, Grade: %c";
printf(format_str, product_id, price, grade);
// Output is printed above

Need a hint?

Make sure the output matches exactly, including spaces and punctuation.