实验2

task.1

代码

#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;

}

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问题1:将random_no取397~476

问题2:将random_no取0~21

问题3:在学号83290397~83290476与83290000~83290021抽取5位

task.2

代码

#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/a/2;
        p2=sqrt(fabs(delta))/a/2;
        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("x1=%.2g-%.2gi",p1,p2);
        }
    }
    return 0;
}

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task.3

代码

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

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task.4

代码

#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<stdlib.h>
int main()
{
    printf("输入今日开销,直到输入-1终止:\n");
    double x,max,min,s;
    scanf("%lf", &x);
    s = 0;
    max = x;
    min = x;
    while (x!=-1)
    {
        s = s + x;
        if (max < x)
            max = x;
        if (min > x)
            min = x;
        scanf("%lf", &x);
    }
    printf("今日累计消费总额:%.1f\n今日最高一笔开销:%.1f\n今日最低一笔开销:%.1f\n", s, max, min);
    return 0;
}

 

 图片

task.5

代码

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

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task.6

代码

#include<stdio.h>
#include<stdlib.h>
#include<time.h>
int main()
{
    int x, s, n=0;
    printf("猜猜2024年11月那一天会是你的lucky day\n开始喽,你有三次机会,猜吧(1~30):");
    srand(time(NULL));
    x = rand() % 30 + 1;
    while (n <2)
    {
        scanf("%d", &s);
        n++;
        if (s > x)
            printf("\n你猜的日期晚了,你的lucky day在前面哦\n再猜(1~30):");
        else if (s < x)
            printf("\n你猜的日期早了,你的lucky day还没到呢\n再猜(1~30):");
        else
        {
            printf("哇,猜中了:)");
            continue;
        }
    }
    scanf("%d", &s);
    if (s > x)
        printf("\n你猜的日期晚了,你的lucky day在前面哦\n");
    else if (s < x)
        printf("\n你猜的日期早了,你的lucky day还没到呢\n");
    else
        printf("哇,猜中了:)");
        printf("\n次数用光啦。偷偷告诉你,11月你的lucky day是%d号", x);
        return 0;
    }
        

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posted @ 2024-10-10 15:38  冯启航  阅读(8)  评论(0编辑  收藏  举报