实验素材2

实验21

 1 #include<stdio.h> 
 2 
 3 int main() 
 4 
 5 {  
 6 
 7 char c1,c2,c3,c4,c5; 
 8 
 9  c1=getchar();
10 
11  c2=getchar();
12 
13  c3=getchar(); 
14 
15  c4=getchar();  
16 
17 c5=getchar(); 
18 
19  putchar(c1);  
20 
21 putchar(c2);  
22 
23 putchar(c3);  
24 
25 putchar(c4);  
26 
27 putchar(c5);  
28 
29 return 0;
30 
31 }

实验22

 1 #include<stdio.h>
 2 int main()
 3 {
 4  int year;
 5  printf("input the year:");
 6  scanf("%d",&year);
 7  if(year%4==0&&year%100!=0||year%400==0)
 8  {
 9   printf("year:%d,mouth:2,days:29",year);
10  } else {
11   printf("year:%d,mouth:2,days:28",year);
12  }
13  return 0;
14 }

实验23

 1 #include<stdio.h> 
 2 int main() 
 3 {  
 4     int a,b,c;
 5   scanf("%d%d%d",&a,&b,&c);
 6   if(a+b<=c||a+c<=b||b+c<=a) 
 7  {  
 8      printf("不能构成三角形");
 9   } else if (a==b||a==c||b==c)  { 
10       if(a==b&&b==c){    printf("是等边三角形");
11    } else {
12     printf("是等腰三角形");
13    }
14   }   else if (a*a+b*b==c*c||a*a+c*c==b*b||c*c+b*b==a*a) {
15    printf("是直角三角形");
16   }  else {
17    printf("是一般三角形");
18   }
19   return 0;
20 
21 }  
22 
23

、

实验24

 1 #include<stdio.h>
 2 int main()
 3 {
 4     double a,x,p,t;
 5     scanf("%lf",&a);
 6     int c;
 7     c=a/500;
 8     switch(c)
 9     {
10     case 0:x=0.00;break;
11     case 1:x=0.05;break;
12     case 2:x=0.08;break;
13     case 3:x=0.08;break;
14     case 4:x=0.10;break;
15     case 5:x=0.10;break;
16     case 6:x=0.10;break;
17     case 7:x=0.10;break;
18     case 8:x=0.10;break;
19     case 9:x=0.10;break;
20     case 10:x=0.15;break;
21     }
22     t=a*x;
23     p=a-t;
24     printf("a=%lf,rate=%lf,tax=%lf,profit=%lf",a,x,t,p);
25     return 0;
26 }
27