#include<stdio.h>

int main()

{

 int a,s,d,f,g;

 putchar(getchar(a));

 putchar(getchar(s));

    putchar(getchar(d));

 putchar(getchar(f));

 putchar(getchar(f));

 putchar('\n');

 return 0;

    

}

#include<stdio.h>

int main()

{ int years;

printf("input a year:");

scanf("%d",&years);

if ((years%4==0&&years%100!=0)||(years%400==0))

printf("years=%d,months=2,days=28",years);

else  

printf("years=%d,months=2,days=29",years);

printf("\n");

return 0; }

#include<stdio.h>

int main()

{

int a,b,c;

printf("输入三个实数");

scanf("%d%d%d",&a,&b,&c);

if (a-b<c&&a-c<b&&b-c<a)

{ 

if (a==b&&b==c&&c==b)  

 printf("此为等边三角形");

   else if ((a==b)||(a==c)||(b==c))

  printf("此为等腰三角形");

 else if((a*a+b*b==c*c)||(a*a==b*b+c*c)||(b*b==c*c+a*a)) 

 printf("此为直角三角形");     else      printf("此为一般三角形");

}

else printf("不构成三角形");

return 0;

 

}

 

#include<stdio.h>

 int main()

{ double a,rate,tax,profit;

scanf("%lf",&a);

if(a<500)

{rate=0.00;

profit=a*(1-rate);

printf("%lf%lf",a,profit,

rate=0.00);}

else if(a<1000)

{rate=0.05;

profit=a*(1-rate);

printf("a=%lf\nprofit=%lf\nrate=0.05",a,profit);}

else if (a<2000)

{rate=0.08;

profit=a*(1-rate);

printf("a=%lf\nprofit=%lf\nrate=0.08",a,profit);}

else if (a<5000) {rate=0.08;

profit=a*(1-rate);

printf("a=%lf\nprofit=%lf\nrate=0.10",a,profit);}

else  if(a>=5000)

{rate=0.08;

profit=a*(1-rate);

printf("a=%lf\nprofit=%lf\nrate=0.15",a,profit);}

printf("\n");

return 0;

}