42.c

计算概论阅读材料

/*41.c*/
#include <stdio.h>
void main(void)
{
	float pay,pay_tax,tax;
	scanf("%f",&pay);
	if(pay<=800)tax=0;
	else{
		pay_tax=pay-800;
		switch((int)(pay_tax/500)){
			case 0:
			tax=0.05*pay_tax;break;
			case 1:	case 2:	case 3:
			tax=0.05*500+(pay_tax-500)*0.1;break;
			case 4: case 5:case 6:case 7:case 8:case 9:
			tax=0.05*500+0.1*1500+0.15*(pay_tax-2000);break;
			default:
				switch((int)(pay_tax/20000)){
				case 0:
				tax=0.05*500+0.1*1500+0.15*3000+0.2*(pay_tax-5000);break;
				case 1:
				tax=0.05*500+0.1*1500+0.15*3000+0.2*15000+0.25*(pay_tax-20000);break;
				case 2:
				tax=0.05*500+0.1*1500+0.15*3000
				+0.2*15000+0.25*20000+0.3*(pay_tax-40000);break;
				case 3:
				tax=0.05*500+0.1*1500+0.15*3000+0.2*15000+0.25*20000
				+0.3*20000+0.35*(pay_tax-60000);break;
				case 4:
				tax=0.05*500+0.1*1500+0.15*3000+0.2*15000+0.25*20000
				+0.3*20000+0.35*20000+0.4*(pay_tax-80000);break;
				default:
				tax=0.05*500+0.1*1500+0.15*3000+0.2*15000+0.25*20000
				+0.3*20000+0.35*20000+0.4*20000+0.45*(pay_tax-100000);
				}
		}
	}
	printf("pay=%10.2f  tax=%10.2f\n",pay,tax);
}