实验2
任务1
1 #include<stdio.h> 2 #include<stdlib.h> 3 #include<math.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)); // 以当前系统时间作为随机种子 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 }
line21 从397开始到476之间随机抽取学号补充到20248329后
line25 从1开始到第22随机抽取学号补充到2024839504后
程序功能:随机抽取学号
任务2
1 // 一元二次方程求解 2 3 #include <stdio.h> 4 #include <math.h> 5 6 int main() { 7 double a, b, c; 8 double delta, p1, p2; // 用于保存中间计算结果 9 10 while(scanf("%lf%lf%lf", &a, &b, &c) != EOF) { 11 if(a == 0) { 12 printf("a = 0, invalid input\n"); 13 continue; 14 } 15 16 delta = b*b - 4*a*c; 17 p1 = -b/2/a; 18 p2 = sqrt(fabs(delta))/2/a; 19 20 if(delta == 0) 21 printf("x1 = x2 = %.2g\n", p1); 22 else if(delta > 0) 23 printf("x1 = %.2g, x2 = %.2g\n", p1+p2, p1-p2); 24 else { 25 printf("x1 = %.2g + %.2gi, ", p1, p2); 26 printf("x2 = %.2g - %.2gi\n", p1, p2); 27 } 28 } 29 30 return 0; 31 }
任务3
1 #include<stdio.h> 2 #include<conio.h> 3 #define r 4 #define y 5 #define g 6 int main() 7 { 8 char c; 9 while(scanf("%c",&c)!=EOF){ 10 if(c=='r'){ 11 printf("stop!\n"); 12 getchar(); 13 } 14 else if(c=='g'){ 15 printf("go go go\n"); 16 getchar(); 17 } 18 else if(c=='y'){ 19 printf("wait a minute\n"); 20 getchar(); 21 } 22 else{ 23 printf("something must be wrong...\n"); 24 getchar(); 25 } 26 } 27 return 0; 28 }
任务4
1 #include<stdio.h> 2 int main() 3 { 4 float money, max = 0, min = 0, total = 0; 5 int count = 0; 6 printf("输入今日开销,直到输入-1终止:\n"); 7 while (scanf_s("%f", &money) ,money!= -1) 8 { 9 if (money > 0) 10 { 11 total = total + money; 12 if (count == 0) 13 { 14 max = min = money; 15 } 16 else { 17 if (money > max) 18 max = money; 19 if (money < min) 20 min = money; 21 } 22 count++; 23 } 24 } 25 printf("今日累计消费总额:%.1f\n", total); 26 printf("今日最高一笔开销:%.1f\n", max); 27 printf("今日最低一笔开销:%.1f\n", min); 28 return 0; 29 }
任务5
1 #include <stdio.h> 2 int main() { 3 int a, b, c; 4 while (1) { 5 scanf_s("%d %d %d", &a, &b, &c); 6 if (a < 0 || b < 0 || c < 0) 7 break; 8 if (a + b > c && a + c > b && b + c > a) { 9 if (a == b && b == c) { 10 printf("等边三角形\n"); 11 } 12 else if (a == b || b == c || a == c) { 13 printf("等腰三角形\n"); 14 } 15 else if (a * a + b * b == c * c || 16 a * a + c * c == b * b || 17 b * b + c * c == a * a) { 18 printf("直角三角形\n"); 19 } 20 else { 21 printf("普通三角形\n"); 22 } 23 } 24 else { 25 printf("不能构成三角形\n"); 26 } 27 } 28 29 return 0; 30 }
任务6
1 #include <stdio.h> 2 #include <stdlib.h> 3 4 int main() 5 { 6 int luckyDay, guess, attempts = 3; 7 srand((unsigned)time(NULL)); 8 luckyDay = rand() % 29 + 1; 9 printf("猜猜 2024 年 11 月哪一天会是你的 lucky day\n"); 10 11 while (attempts > 0) { 12 printf("开始喽,你有三次机会,猜吧(1~30):"); 13 scanf_s("%d", &guess); 14 if (guess == luckyDay) { 15 printf("哇,猜中了:)\n"); 16 return 0; 17 } 18 else if (guess < luckyDay) { 19 printf("你猜的日期早了,你的 lucky day 还没到呢\n"); 20 } 21 else { 22 printf("你猜的日期晚了,你的 lucky day 在前面哦\n"); 23 } 24 25 attempts--; 26 } 27 28 printf("次数用光啦。偷偷告诉你,11 月你的 lucky day 是 %d 号\n", luckyDay); 29 30 return 0; 31 }