3-7.txt

介绍C程设计的一典型案例：例如编写一些小游戏

#include<stdio.h>
int main(void)
{
	int i;
	double rate,salary,tax;
	for(i=1;i<=5;i++)
	{
		printf("Enter the salary:");
		scanf("%lf",&salary);
		if(salary<0)
		{
			printf("The salary is fault!\n");
		}
		else if(salary<=850.00)
		{
			printf("tax=0.00\n");
		}
		else if(salary<=1350.00&&salary>850.00)
		{
			rate=5.0/100;
			tax=rate*(salary-850);
			printf("tax=%.2lf\n",tax);
		}
		else if(salary<=2850.00&&salary>1350.00)
		{
			rate=10.0/100;
			tax=rate*(salary-850);
			printf("tax=%.2lf\n",tax);
		}
		else if(salary<=5850.00&&salary>2850.00)
		{
			rate=15.0/100;
			tax=rate*(salary-850);
			printf("tax=%.2lf\n",tax);
		}
		else
		{
			rate=20.0/100;
			tax=rate*(salary-850);
			printf("tax=%.2lf\n",tax);
		}
	}
	return 0;
}