Calculate average weight for purchases

Last update on March 18 2025 13:28:57 (UTC/GMT +8 hours)

C Practice Exercise

Write a C program that accepts two item's weight and number of purchases (floating point values) and calculates their average value.

C Code:

#include <stdio.h>

int main() 
{
    double wi1, ci1, wi2, ci2, result; // Declare variables for weights and counts
    
    // Prompt user for weight and count of item 1
    printf("Weight - Item1: ");
    scanf("%lf", &wi1);
    
    // Prompt user for count of item 1
    printf("No. of item1: ");
    scanf("%lf", &ci1);
    
    // Prompt user for weight and count of item 2
    printf("Weight - Item2: ");
    scanf("%lf", &wi2);
    
    // Prompt user for count of item 2
    printf("No. of item2: ");
    scanf("%lf", &ci2);
    
    // Calculate average value
    result = ((wi1 * ci1) + (wi2 * ci2)) / (ci1 + ci2);
    
    // Print the average value
    printf("Average Value = %f\n", result);
    
    return 0;
}

Sample Output:

Weight - Item1: 15                                                     
No. of item1: 5                                                        
Weight - Item2: 25                                                     
No. of item2: 4                                                        
Average Value = 19.444444

Flowchart:

For more Practice: Solve these Related Problems:

• Write a C program to compute the weighted average of two items given their weights and corresponding purchase quantities.
• Write a C program to calculate the average weight and variance of purchase items from multiple inputs.
• Write a C program to dynamically read weights and quantities for an unknown number of items, then calculate the overall average.
• Write a C program to calculate the average price per unit weight when given total cost and total weight of purchases.

C Programming Code Editor:

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