实验2

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

#define N 5
#define R1 586
#define R2 701

int main()
{
    int number;
    int i;
    
    srand( time(0) );
    
    for (i = 0;i < N; ++i)
    {
        number = rand() % (R2 - R1 + 1)+ R1;
        printf("20228330%04d\n", number);
    }
    
    return 0;
 } 

#include<stdio.h>

int main()
{
    double x, y;
    char c1, c2, c3;
    int a1, a2, a3;
    
    scanf("%d%d%d", &a1, &a2, &a3);
    printf("a1 = %d, a2 = %d, a3 = %d\n", a1, a2, a3);
    
    scanf("%c%c%c", &c1, &c2, &c3);
    printf("c1 = %c, c2 = %c, c3 = %c\n", c1, c2, c3);
    
    scanf("%lf,%lf", &x, &y);
    printf("x = %lf, y = %lf\n",x, y);
    
    return 0;
}

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

int main()
{
    double x, ans;
    
    while(scanf("%lf", &x) != EOF)
    {
        ans = pow(x, 365);
        printf("%.2f的365次方：%.2f\n", x, ans);
        printf("\n");
    }
    
    return 0;
}

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

int main()
{
    double x, y;
    
    while(scanf("%lf", &x) != EOF)
    {
        y = 9.0 * x / 5.0 + 32;
        printf("摄氏度从= %.2f，华氏度f = %.2f\n", x, y);
        printf("\n");
    }
    
    return 0;

}

#include<stdio.h>

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

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

int main()
{
    int num, i, n;
    srand(time(0));
    num = rand() % 30 + 1;
   
    printf("猜猜2023年4月哪一天是你的lucky day\n");
    
    printf("开始喽，你有三次机会，猜吧（1~30）：");
   
    scanf("%d", &n);
    
    for(i=1;i<3;i++)
    {
        if (n > num)
            printf("你猜的日期晚了，你的lucky day已经过了\n");
        else if (n < num)
            printf("你猜的日期早了，你的lucky day还没到呢\n");
        else
        {
            printf("哇，猜中了:-)");
            break;
        }

        printf("再猜（1~30）：");
        scanf("%d", &n);
    }
    if (n != num)
        printf("次数用完啦。偷偷告诉你：4月，你的lucky day是%d号",num);
    
    return 0;
}

#include<stdio.h>
int main()
{
    int line, column;
    
    for(line=1;line<10;line++)
    {
        for(column=1;column<line+1;column++)
        
        printf("%d*%d=%d ",column,line,line*column);
        
        printf("\n");
    }
    
    return 0;
}

#include<stdio.h>
#include<stdlib.h>
int main()
{
    int n,i,j;
    printf("input n:",n);
    scanf("%d",&n);
    
    for(i=1;i<=n;i++){
        for(j=1;j<i;j++)
            printf("\t");
        for(j=1;j<=2*(n-i)+1;j++)
            printf(" O \t");
        printf("\n");    
        for(j=1;j<i;j++)
            printf("\t");
        for(j=1;j<=2*(n-i)+1;j++)
            printf("<H>\t");
        printf("\n");
        for(j=1;j<i;j++)
            printf("\t");
        for(j=1;j<=2*(n-i)+1;j++)
            printf("I I\t");
        printf("\n");
    }
    system("pause");
    return 0;
}