实验二

 

#include <stdio.h>
int main()
{
    int year;
    int a=28;
    int b=29;
    scanf("%d",&year);
    if((year%100!=0&&year%4==0)||(year%400==0)) { printf("year:%d,month:2,day:%d",year,b);}
    else{printf("year:%d,month:2,day:%d",year,a);}
    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)
    {
        if(a==b&&b==c) printf("等边三角形");
        else if(a==b||b==c||a==c){ if(a*a+b*b==c*c||a*a+c*c==b*b||b*b+c*c==a*a) printf("等腰直角三角形");else{printf("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("直角三角形");}
        else {printf("一般三角形");}
    }
    else{printf("不是三角形");}
    return 0;
}

#include <stdio.h>
int main()
{
double a,b,c,d;
int f;
scanf("%lf",&a);
if (a<500) {b=0.00,f=1;}
else if(a<=500&&a<1000) {b=0.05,f=2;}
else if(a>=1000&&a<2000) {b=0.08,f=3;}
else if(a>=2000&&a<5000) {b=0.10,f=4;}
else{b=0.15;f=5;}
switch (f)
{ case 1:c=a*0.00; d=a-c; printf("a=%lf,rate=%lf,tax=%lf,profit=%lf\n",a,b,c,d);break;
  case 2:c=a*0.05; d=a-c; printf("a=%lf,rate=%lf,tax=%lf,profit=%lf\n",a,b,c,d);break;
  case 3:c=a*0.08; d=a-c; printf("a=%lf,rate=%lf,tax=%lf,profit=%lf\n",a,b,c,d);break;
  case 4:c=a*0.10; d=a-c; printf("a=%lf,rate=%lf,tax=%lf,profit=%lf\n",a,b,c,d);break;
  case 5:c=a*0.15; d=a-c; printf("a=%lf,rate=%lf,tax=%lf,profit=%lf\n",a,b,c,d);break;
}
  
    return 0;
}

 

#include <stdio.h>
int main()
{
    char a,b,c,d,e;
    a=getchar();
    b=getchar();
    c=getchar();
    d=getchar();
    e=getchar();
    putchar(a);
    putchar(b);
    putchar(c);
    putchar(d);
    putchar(e);
    printf("\n");
    return 0;
}