While there is life there is hope.
Put up or shut up.
one,two,three,go!
good good study,day day up
people mountain,people sea
funny mud pee
right your mother right
blue sky big old grandpa
No care three seven two ten one
Make my heart peng peng peng
What do you call a deer with no eye? (No eye deer)
I only know 25 letters of the alphabet (I don't know Y)
Why is “dark” is spelled with a “k” not a “c”? (Because you can’t c (see) in the dark)

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

//1:3:5:7:8:20:28:40
//80080800D5
//213,0,8,8,128,0,0,0

//#define ZXIC

#ifdef ZXIC
#define BAND_WIDTH 8
#else
#define BAND_WIDTH 4
#endif

int str_reverse(char *str)
{   
    int i, j;
    char c;
    
    if (NULL == str || (j = strlen(str)) == 0)
        return -1;
    
    for (i = 0, j--; i < j; i++, j--) {
        c = str[i];
        str[i] = str[j];
        str[j] = c;
    }
    
    return 0;
}

void get_band_value(int band, int *offset, int *value)
{
    int temp;

    *offset = band / BAND_WIDTH;
    temp = band % BAND_WIDTH;
    if (temp == 0) {
        (*offset)--;
#ifdef ZXIC
        temp = BAND_WIDTH;
#else
        temp = 2 * BAND_WIDTH;
#endif
    }
#ifdef ZXIC
    *value = pow(2, temp - 1);
#else
    if (temp == BAND_WIDTH - 1) {
        temp = BAND_WIDTH;
    }
    *value = temp;
#endif
}

int get_frequency_bands(char *band, char *bandBuf)
{
    int bandValue, offset, value;
    char *ptr = NULL, temp[64] = {0};
#ifdef ZXIC
    int i, tempBuf[9] = {0};
#endif

    if (NULL == band || NULL == bandBuf || strlen(band) == 0)
        return -1;

    memcpy(temp, band, strlen(band));
    if ((ptr = strtok(temp, ":")) == NULL) {
        ptr = temp;
    }
    do {
        if ((bandValue = atoi(ptr)) <= 0)
            return -1;
        get_band_value(bandValue, &offset, &value);
#ifdef ZXIC
        tempBuf[offset] += value;
#else
        bandBuf[offset] += value;
        if (bandBuf[offset] > '9') {
            bandBuf[offset] += ('A' - '9' - 1);
        }
#endif
        ptr = strtok(NULL, ":");
    } while (ptr);
#ifdef ZXIC
    offset = 0;
    for (i = 0; i < BAND_WIDTH; i++) {
        offset += sprintf(&bandBuf[offset], "%d,", tempBuf[i]);
    }
    bandBuf[--offset] = '\0';
#else
    bandBuf[++offset] = '\0';
#endif

#ifdef ZXIC
    return 0;
#else
    return str_reverse(bandBuf);
#endif
}

int main(int argc, char *argv[])
{
    char band[32] = "00000000000000000000";

    get_frequency_bands("1:3:5:7:8:20:28:40", band);
    printf("band:%s\n", band);

    return 0;
}

#include <stdio.h>

void print_diamond(int n)
{
    int i, j, k;

    k = 2 * n - 1;
    for (i = 0; i < n; i++) {
        for (j = 1; j <= k; j++) {
            if (j >= n - i && j <= n + i) {
                printf("*");
            } else {
                printf(" ");
            }
        }
        printf("\n");
    }
    for (i = 1; i < n; i++) {
        for (j = 1; j <= k; j++) {
            if (j > i && j <= k - i) {
                printf("*");
            } else {
                printf(" ");
            }
        }
        printf("\n");
    }
}

int main(int argc, char *argv[])
{
    print_diamond(7);

    return 0;
}

导出：

mysqldump -u UserName -p DatabaseName > DatabaseName.sql

导入：

mysql -u UserName -p DatabaseName < DatabaseName.sql

连接：mysql -u UserName -p
创建数据库：create database DatabaseName;
删除数据库：drop database DatabaseName;
查看数据库列表：show databases;
选择数据库：use DatabaseName;
显示表：show tables;
表结构：describe TabelName;
表数目：select count(*) from information_schema.tables where table_schema='DatabaseName';
查看权限：select * from mysql.user where user='UserName'\G
查看权限：show grants for UserName@host;
查询用户：select user,host from mysql.user;
授权所有权限：grant all privileges on DatabaseName.* to UserName@host identified by 'password';

https://prismjs.com/
进入下载页 选择 Languages Themes
下载 JS CSS
将 prism.js prism.css 上传至 /usr/themes/default
在 header.php </head>前插入

<link rel="stylesheet" href="<?php $this->options->themeUrl('prism.css'); ?>">
<script src="<?php $this->options->themeUrl('prism.js'); ?>"></script>

在代码块标记 ``` 后添加语言名