#include <stdio.h>
#include <math.h>

int main ()
{
	char name[30];
	float tax, income, allowance, net_chargeable;
	int marital, children, parent;
	int more = 1;					// Boolean


	do{
		printf("Name? ");
		scanf("%s", name);

		do{
			printf("Total annual income? ");
			scanf("%f", &income);
		}while (income < 0);

		do{
			printf("Marital status (1=Single, 2=Married)? ");
			scanf("%d", &marital);
		}while (marital != 1 && marital != 2);

		if (marital == 2)
			do{
				printf("Number of children? ");
				scanf("%d", &children);
			}while (children < 0);

		do{
			printf("Number of dependent parents? ");
			scanf("%d", &parent);
		} while (parent < 0);	

		allowance = 30000;
	
		if (marital == 2)
		{
			allowance = allowance + 30000;
			if (children <= 5)
				allowance = allowance + children * 10000;
			else 
				allowance = allowance + 50000;
		
		}

		allowance = allowance + parent * 15000;	

		net_chargeable = income - allowance;

		if (net_chargeable <= 0)
			tax = 0;
		else if (net_chargeable <=20000)
			tax = net_chargeable * 0.1;
		else if (net_chargeable <=40000)
			tax = 20000 * 0.1 + (net_chargeable - 20000) * 0.2;
		else
			tax = 20000 * 0.1 + 20000 * 0.2 + (net_chargeable - 40000) * 0.3;

		if (tax > income * 0.25)
			tax = income * 0.25;	

		printf("Tax for %s is $%.0f\n\n", name, tax);

		do{
			printf("Any more (yes=1/no=0)? ");
			scanf("%d", &more);
		}while (more != 1 && more != 0);

		printf("\n");

	}while (more == 1);

	return 0;
}