Example: Rainfall Statistics (Fixed Array) in C

// Rainfall Statistics (Fixed Array)
#include <stdio.h>

int main() {
    // Step 1: Declare variables for rainfall rates, count, sum, min, and max.
    int numRates;
    printf("Enter the number of rainfall rates to process: ");
    scanf("%d", &numRates);

    if (numRates <= 0) {
        printf("Number of rates must be positive.\n");
        return 1; // Indicate an error
    }

    float rainRates[numRates]; // Dynamically sized array (C99 feature)
    float sum = 0.0f;
    float lowestRate;
    float highestRate;

    // Step 2: Get rainfall rates from the user and initialize min/max with the first value.
    printf("Enter rainfall rate #1 (mm/hour): ");
    scanf("%f", &rainRates[0]);
    sum = rainRates[0];
    lowestRate = rainRates[0];
    highestRate = rainRates[0];

    // Step 3: Loop to get remaining rainfall rates and update sum, min, max.
    for (int i = 1; i < numRates; i++) {
        printf("Enter rainfall rate #%d (mm/hour): ", i + 1);
        scanf("%f", &rainRates[i]);
        sum += rainRates[i];

        if (rainRates[i] < lowestRate) {
            lowestRate = rainRates[i];
        }
        if (rainRates[i] > highestRate) {
            highestRate = rainRates[i];
        }
    }

    // Step 4: Calculate the average.
    float averageRate = sum / numRates;

    // Step 5: Print the results.
    printf("\n--- Rainfall Statistics ---\n");
    printf("Average Rainfall Rate: %.2f mm/hour\n", averageRate);
    printf("Lowest Rainfall Rate: %.2f mm/hour\n", lowestRate);
    printf("Highest Rainfall Rate: %.2f mm/hour\n", highestRate);

    return 0;
}