实验二

task1

Q1:赋值random_no班级内学号的随机值

Q2:赋值random_no班级内奇安信班学号的随机值

Q3:随机抽取班级内同学的学号

task2

 1 #include <stdio.h>
 2 #include <math.h>
 3 
 4 int main() {
 5     double a, b, c;
 6     double delta, p1, p2;
 7 
 8     while(scanf("%lf%lf%lf", &a, &b, &c) != EOF) {
 9         if(a == 0) {
10             printf("a = 0, invalid input\n");
11             continue;
12         }
13 
14         delta = b*b - 4*a*c;
15         p1 = -b/2/a;
16         p2 = sqrt(fabs(delta))/2/a;
17 
18         if(delta == 0)
19             printf("x1 = x2 = %.2g\n", p1);
20         else if(delta > 0)
21             printf("x1 = %.2g, x2 = %.2g\n", p1+p2, p1-p2);
22         else {
23             printf("x1 = %.2g + %.2gi, ", p1, p2);
24             printf("x2 = %.2g - %.2gi\n", p1, p2);
25         }
26     }
27 
28     return 0;
29 }

 

task3

 1 #include<stdio.h>
 2 int main()
 3 {   
 4     char read;
 5     while(scanf("%c",&read) != EOF)
 6     {
 7         getchar();
 8      if (read == 'r')
 9      {
10          printf("stop!\n");
11      }
12      else if (read == 'g')
13      {
14          printf("go go go\n");
15      }
16      else if (read == 'y')
17      {
18          printf("wait a minute\n");
19      }
20      else
21      {
22          printf("somthing must be wrong\n");
23      }
24     }
25     
26     return 0;
27 }

 

task4

 1 #include<stdio.h>
 2 #include<math.h> 
 3 int main()
 4 {
 5     printf("输入今日开销,直到输入-1终止:\n");
 6     double read,max = 0,min = 0;
 7     double sum = 0;
 8     do
 9     {
10 
11         scanf("%lf",&read);
12         sum += read;
13         if(read == -1)
14         {
15             break;
16         }
17         else if(read >= max)
18            max = read;
19         else
20            min = read;
21     }while( read > 0 && read <= 20000);
22     printf("今日累计消费总额:%.1lf\n",sum);
23     printf("今日最高一笔开销:%.1lf\n",max);
24     printf("今日最低一笔开销:%.1lf\n",min);
25     return 0;
26 }

 

task5

 1 #include<stdio.h>
 2 #include<math.h>
 3 int main()
 4 {
 5     int a, b, c;
 6     while(scanf("%d%d%d",&a,&b,&c)!=EOF)
 7     {
 8         if(a+b<=c||a+c<=b||b+c<=a)
 9         {
10             printf("不能构成三角形\n");
11         }
12         else if((a==b)&&(a==c)&&(b==c))
13         {
14             printf("等边三角形\n"); 
15         }
16         else if((a==b&&a!=c)||(a==c&&a!=b)||(b==c&&b!=a))
17         {
18             printf("等腰三角形\n");
19          } 
20         else if(pow(a, 2) + pow(b, 2) == pow(c, 2)||pow(a, 2) + pow(c, 2) == pow(b, 2)||pow(c, 2) + pow(b, 2) == pow(a, 2))
21         {
22             printf("直角三角形\n");
23         }
24         else
25         printf("普通三角形\n");
26     }
27     return 0;
28 }

 

task6

 1 #include<stdio.h>
 2 int main()
 3 {  
 4     int ld;
 5     int gue;
 6     int i ;
 7     srand(time(0));
 8     ld = rand()%30 + 1;
 9     printf("猜猜2024年11月哪一天会是你的lucky day\n");
10     printf("开始喽,你有三次机会,猜吧(1~30):");
11     while(i<2)
12     {
13         i++;
14         scanf("%d",&gue);
15         if(gue>ld)
16         {
17             printf("你猜的日期晚了,你的lucky day在前面哦\n");
18             printf("再猜(1~30):");
19         }
20         else if(gue<ld)
21         {
22             printf("你猜的日期早了,你的lucky day还没到呢\n");
23             printf("再猜(1~30):");
24         }
25         else
26         {
27         printf("哇,猜中了:)");
28         break;
29         }
30     }
31     scanf("%d",&gue);
32     if(gue>ld)
33         {
34             printf("你猜的日期晚了,你的lucky day在前面哦\n");
35         }
36         else if(gue<ld)
37         {
38             printf("你猜的日期早了,你的lucky day还没到呢\n");
39         }
40         else
41         printf("哇,猜中了:)");
42         if(gue!=ld)
43         printf("次数用光了。偷偷告诉你,11月你的lucky day是%d号",ld);
44     
45     return 0;
46 }

 

posted @ 2024-10-09 21:07  yueTO  阅读(9)  评论(0编辑  收藏  举报