C

<03.09>

/* * Computes the tax due based on a tax table. * Pre : salary is defined. * Post: Returns the tax due for 0.0 <= salary <= 150,000.00; * returns -1.0 if salary is outside the table range. */ #include <stdio.h> double comp_tax(double salary) { double tax; if (salary < 0.0) tax = -1.0; else if (salary < 15000.00) /* first range */ tax = 0.15 * salary; else if (salary < 30000.00) /* second range */ tax = (salary - 15000.00) * 0.18 + 2250.00; else if (salary < 50000.00) /* third range */ tax = (salary - 30000.00) * 0.22 + 5400.00; else if (salary < 80000.00) /* fourth range */ tax = (salary - 50000.00) * 0.27 + 11000.00; else if (salary <= 150000.00) /* fifth range */ tax = (salary - 80000.00) * 0.33 + 21600.00; else tax = -1.0; return (tax); } int main (void) { double income; printf ("Enter the income > "); scanf ("%lf", &income); printf ("The income tax due is %0.2lf.\n", comp_tax (income)); return (0); }

Enter the income > 70000 The income tax due is 16400.00.