第二次实验

#include<stdio.h>
int main()
{
	char ch;
	while((ch=getchar())!='#')
		putchar(ch);
	return 0;
}

 

**********************************************************************************

#include<stdio.h>
int main()
{
	int year,a,b,c;
	printf("input the year\n");
	scanf("%d",&year);
	a=year/4;
	b=year/100;
	c=year/400;
if(a=0 && b!=0)
printf("year %d,mouth: 2,days: 29\n",year);	 
 else
 if(c=0)
printf("year %d,mouth: 2,days: 29\n",year);
 else
printf("year %d,mouth: 2,days: 28\n",year);
return 0;
}

 

*************************************************************************

#include<stdio.h>
int main()
{
int a,b,c;
printf("please input date");
scanf("%d%d%d",&a,&b,&c);
if(a+b<=c||a+c<=b||b+c<=a)
printf("error");
else if(a==b==c)
printf("该三角形为等边三角形");
else if(a==b||a==c||b==c)
printf("该三角形为等腰三角形");
else if(a*a+b*b<c*c||a*a+c*c<b*b||b*b+c*c<a*a)
printf("该三角形为直角三角形");
else
printf("该三角形为一般三角形");
return 0;
}

 

****************************************************************************

#include<stdio.h>
#define shui0 0
#define shui1 0.05
#define shui2 0.08
#define shui3 0.10
#define shui4 0.15
int main()
{
float a,b,c;
printf("please input date");
scanf("%f",&a);
b=0;
c=0;
if(a<500)
printf("奖金a=%f  税率rate=%f 应缴税款tax=%f 实得奖金数profit=%f",a,shui0,b,a);
else if(a>=500&&a<1000)
{b=a*shui1;
c=a-b;
printf("奖金a=%f  税率rate=%f 应缴税款tax=%f 实得奖金数profit=%f",a,shui1,b,c);}
else if(a>=1000&&a<2000)
{b=a*shui2;
c=a-b;
printf("奖金a=%f  税率rate=%f 应缴税款tax=%f 实得奖金数profit=%f",a,shui2,b,c);}
else if(a>=2000&&a<5000)
{b=a*shui3;
c=a-b;
printf("奖金a=%f  税率rate=%f 应缴税款tax=%f 实得奖金数profit=%f",a,shui3,b,c);}
else if(a>=5000)
{b=a*shui4;
c=a-b;
printf("奖金a=%f  税率rate=%f 应缴税款tax=%f 实得奖金数profit=%f",a,shui4,b,c);}
return 0;
}