Common array operations in C++ - Mini Project: Build & Apply

Common array operations

📖 Scenario: You are working with a list of daily temperatures recorded over a week. You want to perform some common operations on this list to understand the data better.

🎯 Goal: Build a simple C++ program that stores daily temperatures in an array, calculates the average temperature, finds the highest temperature, and prints the results.

📋 What You'll Learn

Create an array with exactly 7 integer temperature values

Create a variable to hold the sum of temperatures

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

Calculate the average temperature as a float

Find the highest temperature using a variable maxTemp

Print the average and highest temperature exactly as shown

💡 Why This Matters

🌍 Real World

Arrays are used to store collections of data like temperatures, sales numbers, or scores. Knowing how to process arrays helps analyze and summarize data.

💼 Career

Many programming jobs require working with arrays and loops to handle lists of information efficiently.

1

Create the temperature array

Create an integer array called temperatures with these exact values: 23, 25, 20, 22, 24, 26, 21

C++

# Create the array temperatures with 7 values
// Your code here

Need a hint?

Use the syntax int arrayName[size] = {values}; to create the array.

2

Set up sum and max variables

Create an integer variable sum and set it to 0. Create an integer variable maxTemp and set it to the first element of temperatures.

C++

int temperatures[7] = {23, 25, 20, 22, 24, 26, 21};
// Create sum and maxTemp variables
// Your code here

Need a hint?

Initialize sum to 0 and maxTemp to the first temperature value.

3

Calculate sum and find max temperature

Use a for loop with index variable i from 0 to 6 to add each temperature to sum. Inside the loop, update maxTemp if temperatures[i] is greater than maxTemp.

C++

int temperatures[7] = {23, 25, 20, 22, 24, 26, 21};
int sum = 0;
int maxTemp = temperatures[0];
// Use a for loop to sum and find max temperature
// Your code here

Need a hint?

Loop from 0 to 6, add each temperature to sum, and update maxTemp if needed.

4

Calculate average and print results

Create a float variable average and set it to sum divided by 7.0. Then print the average temperature with the text "Average temperature: " and the highest temperature with the text "Highest temperature: ".

C++

int temperatures[7] = {23, 25, 20, 22, 24, 26, 21};
int sum = 0;
int maxTemp = temperatures[0];
for (int i = 0; i  maxTemp) {
        maxTemp = temperatures[i];
    }
}
// Calculate average and print results
// Your code here

Need a hint?

Divide sum by 7.0 to get a float average. Use std::cout to print the results.