#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 != 2 && marital != 1);

		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;
}