Calculating Averages with Ease: A Step-by-Step Guide

Getting Started: Inputting the Number of Elements

The first step in calculating an average is to determine how many elements you’ll be working with. To do this, you’ll need to ask the user to input the number of elements, which will be stored in the variable n.

int n;
printf("Enter the number of elements: ");
scanf("%d", &n);

Validating User Input with a While Loop

To ensure that the user inputs a valid number, you’ll use a while loop to check if the entered integer is within the acceptable range of 1 to 100. If the number is outside of this range, the user will be prompted to enter the number again. This process continues until a valid number is entered.

while (n < 1 || n > 100) {
    printf("Invalid input. Please enter a number between 1 and 100: ");
    scanf("%d", &n);
}

Storing Numbers and Calculating the Sum

Once the user has entered a valid number, it’s time to start storing numbers and calculating the sum. A for loop is used to iterate from i = 0 to i = n, during which the user is asked to enter numbers to calculate the average. These numbers are stored in the num[] array, and the sum of each entered element is computed.

int num[n];
int sum = 0;
for (int i = 0; i < n; i++) {
    printf("Enter number %d: ", i + 1);
    scanf("%d", &num[i]);
    sum += num[i];
}

Calculating and Displaying the Average

After the for loop is completed, the average is calculated by dividing the sum by the total number of elements. Finally, the average is printed on the screen, providing the user with the desired result.

double average = (double)sum / n;
printf("The average is: %.2f\n", average);

By following these steps and leveraging your knowledge of C programming concepts, you’ll be able to create a program that accurately calculates averages with ease.