实验2
1 #include <stdio.h> 2 #include <stdlib.h> 3 #include <time.h> 4 5 #define N 5 6 #define N1 397 7 #define N2 476 8 #define N3 21 9 10 int main() { 11 int cnt; 12 int random_major, random_no; 13 14 srand(time(NULL)); 15 16 cnt = 0; 17 while(cnt < N) { 18 random_major = rand() % 2; 19 20 if(random_major) { 21 random_no = rand() % (N2 - N1 + 1) + N1; 22 printf("20248329%04d\n", random_no); 23 } 24 else { 25 random_no = rand() % N3 + 1; 26 printf("20248395%04d\n", random_no); 27 } 28 29 cnt++; 30 } 31 32 return 0; 33 }
随机生成0397到0476间的数字
随机生成0001到0021间的数字
随机抽出几个学号
任务二
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 }
任务三：
1 #include<stdio.h> 2 3 int main(){ 4 char c; 5 6 while(scanf("%c",&c)!=EOF){ 7 if(c=='r') 8 printf("stop!\n"); 9 else if(c=='g') 10 printf("go go go\n"); 11 else if(c=='y') 12 printf("wait a minute\n"); 13 else 14 printf("something must be wrong\n"); 15 getchar(); 16 } 17 18 return 0; 19 }
任务四
1 #include<stdio.h> 2 int main(){ 3 double x,sum=0,max,min; 4 max=x; 5 min=x; 6 printf("输入今日开销，直到输入-1终止：\n"); 7 scanf("%lf",&x); 8 while(x>0){ 9 sum=sum+x; 10 if(x>max) 11 max=x; 12 else 13 min=x; 14 15 scanf("%lf",&x); 16 17 } 18 19 20 printf("今日累计消费总额：%.1lf\n",sum); 21 printf("今日最高一笔开销：%.1lf\n",max); 22 printf("今日最低一笔消费：%.1lf\n",min); 23 }
任务五
1 #include <stdio.h> 2 int main(){ 3 int a,b,c; 4 while(scanf("%d%d%d",&a,&b,&c)!=EOF){ 5 if(a+b<=c||a+c<=b||b+c<=a) 6 printf("不能构成三角形\n"); 7 else if(a*a+b*b==c*c||a*a+c*c==b*b||b*b+c*c==a*a) 8 printf("直角三角形\n"); 9 else if(a==b&&a==c&&b==c) 10 printf("等边三角形\n"); 11 else if(a==b||a==c||b==c) 12 printf("等腰三角形\n"); 13 else 14 printf("普通三角形\n"); 15 } 16 17 return 0; 18 19 }
任务六
1 #include <stdio.h> 2 #include <stdlib.h> 3 int main(){ 4 printf("猜猜2024年11月哪一天会是你的lucky day\n"); 5 printf("开始喽，你有三次机会,猜吧(1~30):" ); 6 int n,ans,input; 7 n=0; 8 ans=rand()%30+1; 9 while(n!=3){ 10 11 scanf("%d",&input); 12 if (input>ans){ 13 printf("你猜的日期晚了，你的lucky day在前面哦\n"); 14 15 } 16 else if(input<ans){ 17 printf("你猜的日期早了，你的lucky day还没到呢\n"); 18 19 } 20 else if(input==ans){ 21 printf("哇，猜中了"); 22 break; 23 } 24 n=n+1; 25 if(n<=2){ 26 27 printf("再猜(1~30):");} 28 } 29 if(n==3){ 30 printf("次数用光啦。偷偷告诉你，11月你的lucky day是%d号",ans); 31 32 } 33 }
