实验二

任务1

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

#define N 5
#define R1 586
#define R2 701
int main ()
 {
     int number ,i ;
     srand (time(0));
     
    for(i=0;i<N;++i)
    {
        number = rand() % (R1 - R2 + 1) + R1;
     printf("20228330%04d\n", number);
    }
    return 0 ;
  } 
  //Q1 取一个在586到701之间的随机数
  //Q2 功能是随机抽出5个学号用来点名 

 

任务2

#include<stdio.h>
int main()
{
    double x, y;
    char c1, c2, c3;
    int a1, a2, a3;
    
    scanf_s("%d%d%d", &a1, &a2, &a3);//ERROR 缺少& 
    printf("a1 = %d, a2 = %d, a3 = %d\n", a1,a2,a3);
     
    getchar();
    scanf_s("%c%c%c", &c1,1, &c2,1, &c3,1);
    getchar();
    printf("c1 = %c, c2 = %c, c3 = %c\n", c1, c2, c3);

    scanf_s("%lf,%lf", &x, &y);//ERROR 应该是lf数值类型 
    printf("x = %lf, y = %lf\n",x, y);
return 0;
}
//int型变量a1, a2, a3分别获得整数 1、2、3
//char型变量c1, c2，c3分别获得字符'x' 'y' 'z'
//double型变量x, y分别获得小数3.2和4.6 

 

 

任务3

#include <stdio.h>
#include <math.h>
int main()
{
    double C,F;
    while(scanf_s("%lf", &C) != EOF)
    {
    F = (9/5)*C + 32 ;
    printf("%.2f摄氏度转换为华氏度为: %.2f\n", C, F);
    printf("\n");
    }
return 0;
}

 

任务4

#include <stdio.h>
#include <stdlib.h>
main ()
 {
     char COLOR;

while(scanf_s("%c",&COLOR,1) != EOF )
    {
            switch(COLOR)
        {
        case 'y':
        printf("wait a minute\n")    ;break;
        case 'g':
        printf("go go go\n")    ;break;
        case 'r':
        printf("stop!\n")    ;break;
        default :
        printf("something must be wrong...\n")     ;break;
    
        }
        getchar();        
    }
    return 0 ;
  } 

 

任务5

#include <stdio.h>
 #include <stdlib.h>
 #include <time.h>
 #define N1 30
  main ()
 {
     int number ,date ,i,m; 
     srand (time(0));
    i = 1;
    m = 0;
    number = rand() % ( N1 -0 +1)+1 ;
          printf("猜猜2023年4月哪一天是你的bad day\n") ;
         printf("你有三次机会，猜吧（1-30）：") ;
     ;
    

    while (scanf_s("%d", &date) != EOF && i <3)
    {
        
        
            if (date == number)
            {
                m = 1; printf("caizhongla\n"); break;
            }
            else
            {
                if (date < number && date> 0)
                {
                    m = 2; printf("猜早啦\n"); i = i + 1;
                }
                else
                {
                    if (date > number && date <= 30)
                    {
                        m = 3; printf("猜晚啦\n"); i = i + 1; 
                    }
                    else
                    {
                        m = 4; printf("你怎么浪费了一次机会呢\n"); i = i + 1; 
                    }
                }
                continue;
            }

        
        
        getchar();
    }
    printf("这一天其实是 %d 号.\n",number);
    
    
    return 0 ;

 

任务6

#include <stdio.h>
int main() {
    int i, j, n;
    for (i = 1; i <= 9; i++) {

        for (j = 1; j <= i; j++)
            printf("%d*%d=%2d  ", i, j, i * j);

        printf("\n");
    }
    return 0;
}

 

任务7

#include <stdio.h>
int main() {
    int i, j, n ;
    scanf_s("%d", &n);
    i = 1;
   
    for (j = 1 ; j <= n ; j++)
    {

    
        while (i <= (j - 1))
        {
                printf(" ");
                printf(" ");
                printf(" ");
                printf("    ");
                i = i + 1;
        }
        printf("\n");
        
        i = 1;
        while (i <=  (j - 1))
        {
            printf(" ");
            printf(" ");
            printf(" ");
            printf("    ");
            i = i + 1;
        }
        i = 1;
        while (i <= (2 * n - 2 * j + 1))
        {
                printf(" ");
                printf("O");
                printf(" ");
                printf("    ");
                i = i + 1;
        }
        
        printf("\n");
        i = 1;
        while (i <=  (j - 1))
        {
            printf(" ");
            printf(" ");
            printf(" ");
            printf("    ");
            i = i + 1;
        }
        i = 1;
        while (i <= (2 * n -2*j+ 1))
        {
            printf("<");
            printf("H");
            printf(">");
            printf("    ");
            i = i + 1;
        }
       
        printf("\n");
        i = 1;
        while (i <=  (j - 1))
        {
            printf(" ");
            printf(" ");
            printf(" ");
            printf("    ");
            i = i + 1;
        }
        i = 1;
        while (i <= (2 * n - 2 * j + 1))
        {
            printf("I");
            printf(" ");
            printf("I");
            printf("    ");
            i = i + 1;
        }
        printf("\n");
        i = 1;
        while (i <=  (j - 1))
        {
            printf(" ");
            printf(" ");
            printf(" ");
            printf("    ");
            i = i + 1;
        }
        printf("\n");
        i = 1;
        while (i <=  (j - 1))
        {
            printf(" ");
            printf(" ");
            printf(" ");
            printf("    ");
            i = i + 1;
        }
        
        printf("\n");
    }
       
        //第一行 空出0个小人位置,打印2n-1个小人
        //第二行 空出2个小人位置,打印2n-3个小人
        //第三行 空出4个小人位置,打印2n-5个小人
        //第j行 空出2(j-1)个小人位置,打印2n-2j+1个小人
    return 0;
}