#include<stdio.h>
int main()
{
int year;
printf("请输入一个年份；");
scanf("%d",&year);
if(year%4 == 0||(year%400==0&&year%100!=0))
{
printf("%d年2月有29天/n",year);
}
else
printf("%d年2月有28天/n",year);
return 0;
#include<stdio.h>
int main()
{
int a,b,c;
scanf("%d%d%d",&a,&b,&c);
if(a+b<=c||a+c<=b||b+c<=a)
{
printf("不能组成三角形");
}
else
{
if((a==b)&&(b==c)&&(a==c))
printf("等边三角形");
if(a==b||b==c||a==c)
printf("等腰三角形");
if(a*a+b*b==c*c||a*a+c*c==b*b||c*c+b*b==a*a)
printf("直角三角形");
else
printf("一般三角形");
}
return 0;
}
#include <stdio.h>
#include <math.h>
int main()
{
double a , rate ,tax,profit;
scanf("%lf",&a);
if(a<500)
{
rate=0;
tax=a*0;
profit=a-tax;
printf("奖金=%lf 税率值=%lf 应交税款=%lf 实得奖金数=%lf ",a,rate,tax,profit);
}
else if (500<=a<1000)
{
rate=0.05;
tax=a*rate;
profit=a-tax;
printf("奖金=%lf 税率值=%lf 应交税款=%lf 实得奖金数=%lf ",a,rate,tax,profit);
}
else if(1000<=a<2000)
{
rate=0.08;
tax=a*rate;
profit=a-tax;
printf("奖金=%lf 税率值=%lf 应交税款=%lf 实得奖金数=%lf ",a,rate,tax,profit);
}
else if(2000<=a<5000)
{
rate=0.10;
tax=a*rate;
profit=a-tax;
printf("奖金=%lf 税率值=%lf 应交税款=%lf 实得奖金数=%lf ",a,rate,tax,profit);
}
else if(a>=5000)
{
rate=0.15;
tax=a*rate;
profit=a-tax;
printf("奖金=%lf 税率值=%lf 应交税款=%lf 实得奖金数=%lf ",a,rate,tax,profit);
}
return 0;
#include <stdio.h>
#include <math.h>
int main()
{
double a , rate ,tax,profit;
scanf("%lf",&a);
if(a<500)
{
rate=0;
tax=a*0;
profit=a-tax;
printf("奖金=%lf 税率值=%lf 应交税款=%lf 实得奖金数=%lf ",a,rate,tax,profit);
}
else if (500<=a<1000)
{
rate=0.05;
tax=a*rate;
profit=a-tax;
printf("奖金=%lf 税率值=%lf 应交税款=%lf 实得奖金数=%lf ",a,rate,tax,profit);
}
else if(1000<=a<2000)
{
rate=0.08;
tax=a*rate;
profit=a-tax;
printf("奖金=%lf 税率值=%lf 应交税款=%lf 实得奖金数=%lf ",a,rate,tax,profit);
}
else if(2000<=a<5000)
{
rate=0.10;
tax=a*rate;
profit=a-tax;
printf("奖金=%lf 税率值=%lf 应交税款=%lf 实得奖金数=%lf ",a,rate,tax,profit);
}
else if(a>=5000)
{
rate=0.15;
tax=a*rate;
profit=a-tax;
printf("奖金=%lf 税率值=%lf 应交税款=%lf 实得奖金数=%lf ",a,rate,tax,profit);
}
return 0;
#include<stdio.h>
int main()
{
int a,b,c;
scanf("%d%d%d",&a,&b,&c);
if(a+b<=c||a+c<=b||b+c<=a)
{
printf("不能组成三角形");
}
else
{
if((a==b)&&(b==c)&&(a==c))
printf("等边三角形");
if(a==b||b==c||a==c)
printf("等腰三角形");
if(a*a+b*b==c*c||a*a+c*c==b*b||c*c+b*b==a*a)
printf("直角三角形");
else
printf("一般三角形");
}
return 0;
}