实验一
#include <stdio.h> #include <stdlib.h> #include <time.h> #define N 5 #define N1 397 #define N2 476 #define N3 21 int main() {int cnt;int random_major, random_no;srand(time(NULL));cnt = 0;while(cnt < N) {random_major = rand() % 2;if(random_major) {random_no = rand() % (N2 - N1 + 1) + N1;printf("20248329%04d\n", random_no);}else {random_no = rand() % N3 + 1;printf("20248395%04d\n", random_no);}cnt++;}return 0; }
line21 生成N2-N1+1~N1之间的随机数
line25生成N3~1间的随机数
该程序生成随机学号
实验二
#include <stdio.h> #include <math.h>int main() {double a, b, c;double delta, p1, p2;while(scanf("%lf%lf%lf", &a, &b, &c) != EOF) {if(a == 0) {printf("a = 0, invalid input\n");continue;}delta = b*b - 4*a*c;p1 = -b/2/a;p2 = sqrt(fabs(delta))/2/a;if(delta == 0)printf("x1 = x2 = %.2g\n", p1);else if(delta > 0)printf("x1 = %.2g, x2 = %.2g\n", p1+p2, p1-p2);else {printf("x1 = %.2g + %.2gi, ", p1, p2);printf("x2 = %.2g - %.2gi\n", p1, p2);}}return 0; }
实验三
#include<stdio.h> int main() {char i;while(scanf("%c",&i)!=EOF){if(i=='r'){printf("stop!\n");}else if (i=='g'){printf("go go go\n");}else if(i=='y'){printf("wait a minute\n"); }else{printf("something must be wrong...\n");} getchar(); } return 0; }
实验四
#include<stdio.h> int main() {int t,max,min;int sum=0;max=0;min=20000;do{scanf("%d",&t);if (t>=0&&t<=20000){sum+=t;}if (t>max){max=t;}if (t<min){min=t;}}while(t!=-1);printf("今日累计消费总额：%d\n今日最高一笔开销：%d\n今日最低一笔开销：%d\n",sum,max,min);return 0; }
实验五
#include<stdio.h> int main(){int a,b,c;while(scanf("%d%d%d",&a,&b,&c)!=EOF){if(a+b<c||b+c<a||a+c<b){printf("不能构成三角形\n");}else if(a*a+b*b==c*c||c*c+b*b==a*a||a*a+c*c==b*b){printf("能构成直角三角形\n");}else if(a==b&&c==b&&a==c){printf("能构成等边三角形\n"); }else if(a==b||c==a||c==b){printf("能构成等腰三角形\n"); }else {printf("能构成一般三角形\n"); } }return 0; }
实验六
#include<stdio.h> #include <stdlib.h> #include <time.h> int main(){int day,x;int k=3; srand(time(NULL));day=rand()%30 + 1;printf("猜猜2024年11月哪一天是你的lucky day\n开始喽，你有三次机会（1~30）:");do{scanf("%d",&x);if (x<day){k--;printf("你猜的日期早了，你的lucky day还没到呢\n");if(k>0)printf("再猜（1~30）："); }else if (x>day){k--;printf("你猜的日期晚了，你的lucky day在前面哦\n");if(k>0)printf("再猜（1~30）："); }else {printf("哇，猜中了:)") ;} }while(k>0);if(k==0){printf("次数用光啦。偷偷告诉你，11月你的lucky day是%d",day);}return 0; }
