实验2 C语言分支与循环基础应用编程-1

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;
}

 Q1:确定学号尾数的范围

Q2:确定学号尾数的范围

Q3:随机生成五个学号

 

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 color;
   while (scanf("%c",&color) !=EOF)
   {
   
   if(color=='r')
       printf("STOP!\n");
   
   else if(color=='g')
   printf("go go go\n");
   
   else if(color=='y')
   printf("wait a minute\n");
   
   else{
       printf("something must be wrong...\n");
   }
   getchar();
}
return 0 ;    
}

 

 

实验四:

#include <stdio.h>
int main()
{
 double x,max,min,total;
 total=0 , max=0 ,min=20000 ;
 while (1)
 {
    scanf("%lf",&x);
    
    if(x==-1)
    break ;    
    
    total=total+x ;
     if(x-max>0){
         max=x ;
         
     }
     if(x-min<0){
         min=x ;
     }

 }
    printf("今日累计消费总额:%.1lf\n",total);
     printf("今日最高一笔开销:%.1lf\n",max );
     printf("今日最低一笔开销:%.1lf\n",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 || a-b>=c){
       
         printf("不能构成三角形"); 
      continue ;
    }
    else if(a==b && b==c){    
         printf("等边三角形");
         continue;
   }
    else if(a*a +b*b==c*c || a*a+c*c==b*b || b*b+c*c==a*a) {    
      printf("直角三角形");
      continue;
}
    else if(a==b || b==c ||a==c){
      printf("等腰三角形");
      continue;
}
    else
      printf("普通三角形"); 
   }
 return 0 ;    
}

 

 

 

实验六:

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
int main()
{
    int x ,i ,a;
    a=rand()%30+1 ;
    printf("猜猜2024年11月哪一天会是你的lucky day \n 开始喽,你有三次机会,猜吧(1~30):");
   
    for(i=0;i<3;i++){
    scanf("%d",&x) ;    
    if(x>a)
    printf("你猜的日期晚了,你的lucky day在前面哦\n");
    else if(x<a)
     printf("你猜的日期早了,你的lucky day还没到呢\n");
    else{
     printf("哇,猜中啦。");
     break ;
}
}
  printf("次数用光啦。偷偷告诉你,11月你的lucky day是%d",a,"") ;
return 0 ;
}

 

 

 

posted @ 2024-10-15 22:43  唐文鑫  阅读(0)  评论(0编辑  收藏  举报