015.1_gross_pay_taxes_net_pay_with_hours_worked.c

// with functions

#include <stdio.h>

float calcGrossPay(float numberOfHoursWorked) {
  float hourlyPayUnderFortyHours = 12.0;
  float hourlyPayAboveFortyHours = 18.0;

  if (numberOfHoursWorked <= 40.0) {
    return (numberOfHoursWorked * hourlyPayUnderFortyHours);
  }

  else if (numberOfHoursWorked > 40.0) {
    return (40.0 * hourlyPayUnderFortyHours) + ((numberOfHoursWorked - 40.0) * hourlyPayAboveFortyHours);
  }
}

float calcTaxes(float numberOfHoursWorked) {
  float grossPay = calcGrossPay(numberOfHoursWorked);
  float taxFirstThreeHun = 0.15;
  float taxNextOneFifty = 0.2;
  float taxRest = 0.25;

  if (grossPay <= 300) {
    return grossPay * taxFirstThreeHun;
  }

  else if (grossPay > 300 && grossPay <= 450) {
    return (300 * taxFirstThreeHun) + ((grossPay - 300) * taxNextOneFifty);
  }

  else if (grossPay > 450) {
    // taxes = ((300*taxFirstThreeHun) + (150*taxNextOneFifty) + ((grossPay-450)*taxRest));
    return 75 + ((grossPay - 450) * taxRest);
  }
}

float calcNetPay(float numberOfHoursWorked) {
  return calcGrossPay(numberOfHoursWorked) - calcTaxes(numberOfHoursWorked);
}

int main() {
  float numberOfHoursWorked;

  printf("Enter the number of hours a person has worked: ");
  scanf("%f", &numberOfHoursWorked);
  printf("\n");

  // numberOfHoursWorked = 30.0; // 40*12 + 5*18 = 570

  printf("\n~*~*~*~*~*~*~*~*~*~*~*~*~ \n \n");

  printf("Number of Hours Worked: %.2f \n", numberOfHoursWorked);

  printf("Gross Pay: %.2f \n", calcGrossPay(numberOfHoursWorked));
  printf("Taxes: %.2f \n", calcTaxes(numberOfHoursWorked));
  printf("Net Pay: %.2f \n", calcNetPay(numberOfHoursWorked));
}