Array Traversal Patterns in DSA C - Build from Scratch

Array Traversal Patterns

📖 Scenario: You are working with a list of daily temperatures recorded over a week. You want to analyze these temperatures to find out which days were warmer than a certain threshold.

🎯 Goal: Build a program that traverses an array of temperatures, checks each temperature against a threshold, and collects the warmer temperatures into a new array.

📋 What You'll Learn

Create an array called temperatures with exactly these values: 23, 27, 21, 30, 25, 28, 22

Create an integer variable called threshold and set it to 25

Use a for loop with an index variable i to traverse the temperatures array

Inside the loop, check if the current temperature is greater than threshold

If yes, add that temperature to a new array called warmer_days

Keep track of the number of warmer days in an integer variable called count

Print the contents of warmer_days array separated by spaces

💡 Why This Matters

🌍 Real World

Analyzing temperature data to find days warmer than a certain limit is common in weather forecasting and climate studies.

💼 Career

Understanding array traversal and conditional selection is fundamental for data processing tasks in software development and data analysis roles.

1

Create the temperatures array

Create an integer array called temperatures with exactly these values: 23, 27, 21, 30, 25, 28, 22

DSA C

# Your code here

Hint

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

2

Set the threshold value

Create an integer variable called threshold and set it to 25

DSA C

int temperatures[] = {23, 27, 21, 30, 25, 28, 22};
# Your code here

Hint

Use int threshold = 25; to create and set the variable.

3

Traverse the array and collect warmer days

Create an integer array called warmer_days with size 7, an integer variable count set to 0, and use a for loop with index i from 0 to 6 to check if temperatures[i] is greater than threshold. If yes, add temperatures[i] to warmer_days[count] and increment count

DSA C

int temperatures[] = {23, 27, 21, 30, 25, 28, 22};
int threshold = 25;
# Your code here

Hint

Use a for loop from 0 to 6 and an if statement inside it to check each temperature.

4

Print the warmer days

Use a for loop with index j from 0 to count - 1 to print each value in warmer_days separated by spaces

DSA C

int temperatures[] = {23, 27, 21, 30, 25, 28, 22};
int threshold = 25;
int warmer_days[7];
int count = 0;
for (int i = 0; i  threshold) {
        warmer_days[count] = temperatures[i];
        count++;
    }
}
# Your code here

Hint

Use printf("%d ", warmer_days[j]); inside the loop to print each temperature followed by a space.