ex2.c

// (Sales Commission Calculator) One large chemical company pays its salespeople on a commission basis. The salespeople receive $200 per week plus 9% of their gross sales for that week. For example, a salesperson who sells $5000 worth of chemicals in a week receives $200 plus 9% of $5000, or a total of $650. Develop a program that will input each salesperson’s gross sales for last week and will calculate and display that salesperson’s earnings.

#include <stdio.h>

int main()
{
    // Declare variables
    double sales, commission, earnings;

    // Input sales
    printf("Enter sales in dollars (-1 to end): ");
    scanf("%lf", &sales);

    // Calculate earnings
    while (sales != -1)
    {
        commission = sales * 0.09;
        earnings = 200 + commission;

        // Display earnings
        printf("Salary is: $%.2lf\n", earnings);

        // Input sales
        printf("Enter sales in dollars (-1 to end): ");
        scanf("%lf", &sales);
    }

    return 0;
}