One-dimensional arrays in C - Mini Project: Build & Apply

Working with One-Dimensional Arrays in C

📖 Scenario: You are helping a small store keep track of the number of items sold each day over a week. You will use a one-dimensional array to store these daily sales numbers.

🎯 Goal: Build a simple C program that stores daily sales in an array, calculates the total sales for the week, and prints the total.

📋 What You'll Learn

Create an integer array named daily_sales with exactly 7 elements representing sales for each day of the week.

Create an integer variable named total_sales to hold the sum of all sales.

Use a for loop with the variable i to iterate over the daily_sales array.

Add each element of daily_sales to total_sales inside the loop.

Print the value of total_sales using printf.

💡 Why This Matters

🌍 Real World

Stores and small businesses often track daily sales to understand their performance and plan inventory.

💼 Career

Knowing how to use arrays and loops is essential for programming tasks involving data collection and processing in many software development jobs.

1

Create the sales array

Create an integer array called daily_sales with these exact values: 5, 8, 6, 7, 10, 9, 4.

C

# Create the integer array daily_sales with 7 elements
# Your code here

Need a hint?

Use curly braces {} to list the values inside the array.

2

Create the total sales variable

Create an integer variable called total_sales and set it to 0.

C

int daily_sales[7] = {5, 8, 6, 7, 10, 9, 4};
# Create an integer variable total_sales and set it to 0
# Your code here

Need a hint?

Initialize total_sales to zero before adding values.

3

Sum the sales using a for loop

Use a for loop with the variable i to iterate from 0 to 6 inclusive. Inside the loop, add daily_sales[i] to total_sales.

C

int daily_sales[7] = {5, 8, 6, 7, 10, 9, 4};
int total_sales = 0;
# Use a for loop to add each daily_sales element to total_sales
# Your code here

Need a hint?

Use total_sales += daily_sales[i]; inside the loop to add each day's sales.

4

Print the total sales

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

C

int daily_sales[7] = {5, 8, 6, 7, 10, 9, 4};
int total_sales = 0;
for (int i = 0; i < 7; i++) {
    total_sales += daily_sales[i];
}
# Print the total_sales value with a message
# Your code here

Need a hint?

Use printf("Total sales: %d\n", total_sales); to print the result.