实验2_C语言分支与循环基础应用编程

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;
}

 

posted @ 2024-10-09 21:00  zjcblogs  阅读(5)  评论(0编辑  收藏  举报