C Program to Calculate Average Value of Two Items

C Program to Calculate Average Value of Two Items
Learning C? This program clearly demonstrates floating-point input, arithmetic and averages. Calculate the average value of two items from their weights and quantities, solidifying scanf() and printf() use in a practical context.
Heads Up: This program uses simple averaging, ignoring complex statistical weighting.

#include <stdio.h> // Essential for console input (scanf) and output (printf)

int main() {
    float weight1, weight2;   // Weights of the two items
    float quantity1, quantity2; // Number of units for each item
    float totalWeight, totalQuantity, average; // Variables for calculations and result

    // Get input for first item
    printf("Enter weight and number of purchases for item 1: ");
    scanf("%f %f", &weight1, &quantity1);

    // Get input for second item
    printf("Enter weight and number of purchases for item 2: ");
    scanf("%f %f", &weight2, &quantity2);

    // Calculate totals
    totalWeight = (weight1 * quantity1) + (weight2 * quantity2);
    totalQuantity = quantity1 + quantity2;

    // Calculate average
    average = totalWeight / totalQuantity;

    // Display result
    printf("Average value per item = %.2f\n", average);

    return 0; // Program finished successfully
}

Sample Output:
Enter weight and number of purchases for item 1: 5.5 2
Enter weight and number of purchases for item 2: 3.0 3
Average value per item = 3.90

Program Breakdown: Essential C Concepts
This C program processes numerical input and performs calculations using floating-point variables for decimal accuracy.

Input/Output (scanf, printf): Your tools for getting user data (using %f for decimals) and presenting results.
Calculation Logic: Determines totalWeight (each item's weight * quantity summed) and totalQuantity. average is then totalWeight / totalQuantity.

Formatting (%.2f): Ensures the final average displays neatly, rounded to two decimal places.
This demonstrates core C skills: input, precise calculation, and clear output in one clean solution.

Conclusion
You've successfully coded a practical C program for calculating averages! This exercise is crucial for understanding floating-point numbers, user input, and arithmetic operations in C. Challenge yourself: add more items, or try different data types for greater precision!