实验2

任务1:

#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));  //以当前系统时间作为随机种子

cnt=0;
while(cnt<N){
random_major=rand()%2;

if(random_major) {
        printf("20248329%04d\n", random_no);
}
else {
    random_no = rand() % N3 + 1;
    printf("20248395%04d\n", random_no);
    }
    cnt++;
  }
  
  return 0;
}

Line21:生成N1到N2之间的任意整数并赋值给random_no

Line25:生成1到N3间的任意整数并赋值给random_no

功能:在计类11.12班和奇安信班中随机抽取一个学号

 

任务2:

#include <stdio.h>
#include <math.h>

int main() {
    double a, b, c;
    double delta, p1, p2; // 用于保存中间计算结果

    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;
}

 

任务3:

#include<stdio.h>
int main()
{
    char ans;
    while(scanf("%c",&ans)!=EOF)
    {
        if(ans=='g')
        {
            printf("go go go\n");
        }
        else if(ans=='y'){
        printf("wait a minute\n");
        }
        else if(ans=='r'){
            printf("stop!\n");
        }
        else{
            printf("something must went wrong\n");
        }
        getchar();
    }
    return 0;  
    }

任务4:

#include <stdio.h>

int main(){
    double a;
    double sum=0,max=0,min=20000;
    
    printf("输入今日开销,直到输入-1终止:\n");
    
    while(scanf("%lf",&a)&&a!=-1){
        sum=sum+a;
        
        if(a>max) 
        max=a;
        
        if(a<min)
        min=a;
        
    
    }
    sum++;
    printf("今日累计消费总额:%.1lf\n",sum);
    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;
    
}

任务5:

#include <stdio.h>

int main(){
    int a,b,c;
    
    while(scanf("%d%d%d",&a,&b,&c)!=EOF){
        if((a+b)<c||(a+c)<b)
        printf("不能构成三角形\n");
        
        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\n");
            else if(a==b&&a==c)
            printf("等边三角形\n");
            else if(a==b||b==c||a==c) 
            printf("等腰三角形\n");
            else
            printf("普通三角形\n"); 
        }
        
    }
    
    
    return 0;
    
}

任务6:

#include <stdio.h>
#include <stdlib.h>
#include <time.h>

int main(){
    int luckey_day,ans;
    int n=0;
    
    srand(time(NULL));
    luckey_day=rand()%30+1;
    printf("猜猜2024年11月哪一天是你的luckey day\n");
    printf("开始喽,你有三次机会,猜吧(1~30):");
    while(scanf("%d",&ans)&&n!=2){
        if(ans==luckey_day){
        printf("猜中了!\n");
        break;}
        
        else if(ans<luckey_day){
        printf("你猜的日期早了,再猜:");
        n++;
        continue;} 
        
        else{
            printf("你猜的日期晚了,再猜:"); 
            n++;
            continue;
        }
        
        
    }
    if(n==2)
    printf("你的次数用光啦!偷偷告诉你,你11月的luckey day是%d号\n",luckey_day);
    
    
    return 0;
    
}

 

posted @ 2024-10-10 00:27  kilitok  阅读(9)  评论(0编辑  收藏  举报