作业

作业1
#include <stdio.h>
#include <stdlib.h>
#include <time.h> 
int main()
{
	int mynumber,yournumber,count=0;
	char c;
	do{	
	 	
	srand((unsigned)time(NULL));
		mynumber = (rand() % (101 - 1)) + 1; 
		do{
			printf("请输入您猜想的数值：");
			scanf("%d",&yournumber);  
count++;
			if(yournumber>mynumber)
				printf("数字太大请您重新输入
");
			else if(yournumber<mynumber)
				printf("数字太小请您重新输入
"); 
			else if(yournumber!=mynumber)
				printf("您输入的数字不合法，请重新输入
");
			}
			while(yournumber!=mynumber);
		 	{
			if(count<=3)
				printf("天才！
");
			else if(count>3 && count<=7)
				printf("智力正常！
");
			else
				printf("笨！");
			}
				printf("您一共猜了%d次
",count);
		printf("继续请按Y/y，退出请按N/n：
");
		getchar();
		c=getchar();
		system("cls");
	}while(c=='Y' || c=='y');
	return 0;
}

作业2

#include<stdio.h>
#include<math.h>
int main()
{
int a=0,b=0,c=0,z;
float s,ave;
printf("请输入三条边： ");
scanf("%d%d%d",&a,&b,&c);
if(a+b>=c && a+c>=b && b+c>=a)
{
s=(a+b+c)*1/2.0;
ave=sqrt(s*(s-a)*(s-b)*(s-c));
printf("面积为：%f ",ave);
z=a+b+c;
printf("周长为：%d ",z);
}
else
printf("不能构成三角形。 ");
return 0;
}

作业3

#include <stdio.h>
int main()
{
    float a,tax=0,TaxIncome=0;
    printf("请输入您本月收入总额（元）：");
    scanf("%f",&a);
    if(a<=1455)
    {
        tax=(a-3500)*0.03-0;
        TaxIncome=a-tax;
    }
    else if(a>1455 || a<=4155)
    {
        tax=(a-3500)*0.1-105;
        TaxIncome=a-tax; 
    }
    else if(a>4155 || a<=7755)
    {
        tax=(a-3500)*0.2-555;
        TaxIncome=a-tax;
    }
    else if(a<7755 || a<=27255)
    {
        tax=(a-3500)*0.25-1005;
        TaxIncome=a-tax;
    }
    else if(a>27255 || a<=41255)
    {
        tax=(a-3500)*0.3-2755;
        TaxIncome=a-tax;
    }
    else if(a>41255 || a<=57505)
    {
        tax=(a-3500)*0.35-5505;
        TaxIncome=a-tax;
    }
    else
    {
        tax=(a-3500)*0.45-13505;
        TaxIncome=a-tax;
    }
    printf("您本月应缴税为：%f
您本月的税后收入为：%f
",tax,TaxIncome);
    return 0;
}
#include <stdio.h>

int main()
{
    float salary,tax=0,TaxIncome=0,c;
    int a;
    printf("请输入您的工资：
");
    scanf("%f",&salary);
    c=salary-3500;
    {
        if(c<=0)
        a=0;
        if(c<=1455)
        a=1;
        else if(c>1455&&c<=4155)
        a=2;
        else if(c>4155&&c<=7755)
        a=3;
        else if(c>7755&&c<=27255)
        a=4;
        else if(c>27255&&c<=41255)
        a=5;
        else if(c>41255&&c<=57505)
        a=6;
        else
        a=7;
    }
    switch(a)
    {
        case 1:printf("tax=(c-3500)*0.03 TaxIncome=c-tax
");
        break;
        case 2:printf("tax=(c-3500)*0.1 TaxIncome=c-tax
");
        break;
        case 3:printf("tax=(c-3500)*0.2 TaxIncome=c-tax
");
        break;
        case 4:printf("tax=(c-3500)*0.25 TaxIncome=c-tax
");
        break;
        case 5:printf("tax=(c-3500)*0.3 TaxIncome=c-tax
");
        break;
        case 6:printf("tax=(c-3500)*0.35 TaxIncome=c-tax
");
        break;
        default:printf("tax=(c-3500)*0.45 TaxIncome=c-tax
");
        break;
    }
    salary=TaxIncome;
    printf("您本月应缴税：%f元
 您本月的税后收入为：%f元
",tax,TaxIncome);
    return 0;
} 





心得

每一次都是进步 对程序的认识与日俱增 相信在不久的将来 我一定能够达到心中的目标