P2.java

import java.text.DecimalFormat;
import java.util.Scanner;

/* P2
 * Mindy Mach
 * 	w/ changes by Chris
 */

public class P2 {
	
	public static void main(String[] args) {
		
		/*
		 * Variable names should be easy to identify. "t" is a terrible name for just about anything.
		 * These names should be self-explanatory, so there's no need to ask "what does tot mean? Total Taxes?"
		 */
		int exemptions;
		double grossSalary, charity, capitalGains, interestIncome, totalIncome, adjustedIncome;
		double taxes = 0.0; //this is initialized because we need might/will add to it later, while the others are just set.
		
		//Scanner initialization 
		Scanner keyboard = new Scanner(System.in);
		
		System.out.print("Number of Exemptions: ");
		exemptions = keyboard.nextInt();
		
		System.out.print("Gross Salary: ");
		grossSalary = keyboard.nextDouble();
		
		System.out.print("Interest income: ");
		interestIncome = keyboard.nextDouble();
		
		System.out.print("Capital Gains: ");
		capitalGains = keyboard.nextDouble();
		
		System.out.print("Charitable Contributions: ");
		charity = keyboard.nextDouble();
		
		totalIncome = (grossSalary + interestIncome + capitalGains);
		System.out.println("Total Income: $" + totalIncome);
		
		System.out.println("Adjusted Income: $" + (totalIncome-(exemptions *1500)- charity));
		//adjustedIncome is no longer declared down here. It's up at the top with its friends.
		adjustedIncome = (totalIncome-(exemptions *1500)- charity);
		
		
		if( adjustedIncome > 10000)
		{
			if( adjustedIncome < 32000)
			{
				/* Instead of using temporary variables A, B, and C, and then adding them 
				 * together to set taxes (previous tot), just add directly to taxes.
				 */
				
				taxes += (adjustedIncome - 10000) * 0.15;
			}
			else
			{
				taxes += (22000 * 0.15);
			}
		}
		if (adjustedIncome > 32000)
		{ 
			if(adjustedIncome < 50000)
			{
				taxes += (adjustedIncome - 32000) * 0.23;
			}
			else 
			{
				taxes += 18000 * 0.23;
			}
		}
		if (adjustedIncome > 50000)
		{
			taxes += (adjustedIncome - 50000) * 0.28;
		}
		
		DecimalFormat  fmt = new DecimalFormat("#.00");
		System.out.println("Total Tax: $" + fmt.format(taxes));
		
		//close the Scanner after we're done with it.
		keyboard.close();
	}

}