Operator precedence - Mini Project: Build & Apply

Operator precedence

📖 Scenario: Imagine you are calculating the total cost of items in a shopping cart. You want to make sure the calculations happen in the right order so you get the correct total.

🎯 Goal: You will write a small C program that uses operator precedence to calculate a total price correctly.

📋 What You'll Learn

Create variables with exact names and values as instructed

Use operator precedence correctly in an expression

Print the final calculated total

💡 Why This Matters

🌍 Real World

Calculating prices, discounts, and totals correctly is important in shopping apps and billing systems.

💼 Career

Understanding operator precedence helps avoid bugs in financial calculations and data processing in software development.

1

Create initial variables

Create three int variables called price, quantity, and discount with values 50, 3, and 20 respectively.

C

# Create int variables price, quantity, and discount with values 50, 3, and 20
// Your code here

Need a hint?

Use the syntax int variable_name = value; to create each variable.

2

Add a variable for total cost calculation

Create an int variable called total and set it to zero.

C

int price = 50;
int quantity = 3;
int discount = 20;

// Create int variable total and set it to 0
// Your code here

Need a hint?

Remember to use int total = 0; to create the variable.

3

Calculate total using operator precedence

Calculate the total price after discount using the expression price * quantity - discount and assign it to the variable total.

C

int price = 50;
int quantity = 3;
int discount = 20;
int total = 0;

// Calculate total using price * quantity - discount
// Your code here

Need a hint?

Use the expression price * quantity - discount exactly to assign to total.

4

Print the total

Use printf to print the text Total: followed by the value of total and a newline.

C

int price = 50;
int quantity = 3;
int discount = 20;
int total = 0;
total = price * quantity - discount;

// Print the total with printf
// Your code here

Need a hint?

Use printf("Total: %d\n", total); inside main to print the result.