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 prices of five products. You will use a one-dimensional array to store these prices and then calculate the total cost.

🎯 Goal: Create a program that stores product prices in an array, calculates the total price, and prints the total.

📋 What You'll Learn

Create a one-dimensional array called prices with exactly five double values: 10.5, 23.0, 7.25, 15.0, and 9.99

Create a variable called total of type double and initialize it to 0

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

Add each price to the total inside the loop

Print the total with the message Total price:

💡 Why This Matters

🌍 Real World

Stores and shops often use arrays to keep track of product prices or quantities.

💼 Career

Understanding arrays and loops is essential for programming tasks like data processing, inventory management, and financial calculations.

1

Create the prices array

Create a one-dimensional array called prices of type double with these exact values: 10.5, 23.0, 7.25, 15.0, and 9.99.

C++

// Your code here

Need a hint?

Use the syntax double prices[5] = {value1, value2, ..., value5}; to create the array.

2

Create the total variable

Create a variable called total of type double and set it to 0 inside the main function, after the prices array.

C++

#include 

int main() {
    double prices[5] = {10.5, 23.0, 7.25, 15.0, 9.99};
    
    // Create total variable here
    
    return 0;
}

Need a hint?

Write double total = 0; inside the main function.

3

Calculate the total price using a for loop

Use a for loop with the variable i to iterate from 0 to 4 (inclusive). Inside the loop, add prices[i] to the total variable.

C++

#include 

int main() {
    double prices[5] = {10.5, 23.0, 7.25, 15.0, 9.99};
    double total = 0;
    
    // Add a for loop to sum prices
    
    return 0;
}

Need a hint?

Use for (int i = 0; i < 5; i++) and inside the loop write total += prices[i];.

4

Print the total price

Write a std::cout statement to print the text Total price: followed by the value of total. Then add a newline.

C++

#include 

int main() {
    double prices[5] = {10.5, 23.0, 7.25, 15.0, 9.99};
    double total = 0;
    for (int i = 0; i < 5; i++) {
        total += prices[i];
    }
    
    // Print total price
    
    return 0;
}

Need a hint?

Use std::cout << "Total price: " << total << std::endl; to print.