Common array operations - 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 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 integer array with exactly 7 elements representing daily temperatures.

Create an integer variable to hold the sum of temperatures.

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

Calculate the average temperature as a float.

Find the highest temperature using a variable called max_temp.

Print the average temperature and the highest temperature using printf.

💡 Why This Matters

🌍 Real World

Analyzing temperature data helps in weather forecasting and understanding climate patterns.

💼 Career

Knowing how to work with arrays and loops is essential for many programming jobs, especially in data processing and embedded systems.

1

Create the temperature array

Create an integer array called temperatures with exactly 7 elements: 23, 25, 19, 22, 24, 20, 21.

C

# Create the integer array temperatures with 7 elements
// Your code here

Need a hint?

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

2

Create a sum variable

Create an integer variable called sum and set it to 0 to hold the total of temperatures.

C

int temperatures[7] = {23, 25, 19, 22, 24, 20, 21};
// Create an integer variable sum and set it to 0
// Your code here

Need a hint?

Initialize sum to zero before adding temperatures.

3

Calculate the sum and find the max temperature

Use a for loop with the variable i from 0 to 6 to add each element of temperatures to sum. Also, create an integer variable max_temp initialized to the first element of temperatures. Inside the loop, update max_temp if the current temperature is higher.

C

int temperatures[7] = {23, 25, 19, 22, 24, 20, 21};
int sum = 0;
// Create max_temp and set it to temperatures[0]
// Use a for loop with i from 0 to 6 to add temperatures[i] to sum
// Inside the loop, update max_temp if temperatures[i] is greater
// Your code here

Need a hint?

Use for (int i = 0; i < 7; i++) to loop through the array.

4

Calculate average and print results

Create a float variable called average and set it to sum / 7.0f. Then use printf to print the average temperature with one decimal place and the highest temperature as an integer.

C

int temperatures[7] = {23, 25, 19, 22, 24, 20, 21};
int sum = 0;
int max_temp = temperatures[0];
for (int i = 0; i  max_temp) {
        max_temp = temperatures[i];
    }
}
// Calculate average as float
// Print average and max_temp using printf
// Your code here

Need a hint?

Use float average = sum / 7.0f; to get a decimal average.

Use printf("Average temperature: %.1f\n", average); to print one decimal place.