#include <stdio.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;
			tax = tax + (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;
}