Example: Circuit Board Selling Price Calculator in C

// Circuit Board Selling Price Calculator
#include <stdio.h>

int main() {
    // Step 1: Declare variables to store cost, profit margin, and selling price.
    float manufacturingCost;
    float profitMarginPercentage; // As a percentage, e.g., 25 for 25%
    float sellingPrice;

    // Step 2: Prompt the user to enter the manufacturing cost.
    printf("Enter the manufacturing cost of the circuit board ($): ");
    scanf("%f", &manufacturingCost);

    // Step 3: Prompt the user to enter the desired profit margin percentage.
    printf("Enter the desired profit margin percentage (e.g., 25 for 25%%): ");
    scanf("%f", &profitMarginPercentage);

    // Step 4: Calculate the selling price.
    // Convert percentage to decimal (e.g., 25% -> 0.25)
    float profitMarginDecimal = profitMarginPercentage / 100.0;
    sellingPrice = manufacturingCost * (1 + profitMarginDecimal);

    // Step 5: Display the calculated selling price.
    printf("\n--- Calculation Result ---\n");
    printf("Manufacturing Cost: $%.2f\n", manufacturingCost);
    printf("Profit Margin: %.2f%%\n", profitMarginPercentage);
    printf("The calculated selling price is: $%.2f\n", sellingPrice);

    return 0;
}