Liunx and Windows systems use VS Code to configure C++ to connect to MySql

prerequisites

1. install Visual Studio Code.
2. install C/C++ extension for VS Code.

3. Configure the C/C++environment and make sure it is installed GCC.

Create project

1. Create a testCPP project under VScode, and then create a test.cpp file in the project root directory, which stores the code for connecting to the database.

#include <mysql.h>
#include <iostream>
using namespace std;
 
int main() {
  MYSQL *conn_mysql;
  // 初始化连接
  conn_mysql = mysql_init(NULL);
  if (!conn_mysql) {
    fprintf(stderr, "Mysql初始化连接失败\n");
    return(EXIT_FAILURE);
  }

  // 参数分别为：初始化的连接句柄指针，主机名（或者IP），用户名，密码，数据库名，端口号，NULL，0）后面两个参数在默认安装mysql>的情况下不用改
  conn_mysql = mysql_real_connect(conn_mysql, "127.0.0.1", "root", "123456", "test_c", 3306, NULL, 0);
  if (conn_mysql){
    printf( "连接成功！\n" );
  }
  else{
    printf( "连接失败！\n" );
  }

  // 关闭数据库连接
  mysql_close(conn_mysql); 
  return(EXIT_SUCCESS);
}
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2. To configure tasks, select Terminal -> Configuration Tasks in the top menu bar, a folder will be generated in the project directory .vscode, and .vscodefiles will also be generated under the folder task.json.

• Tasks.json file configuration under liunx

{
  // 请参阅 https://go.microsoft.com/fwlink/?LinkId=733558 
  //查看有关 tasks.json 格式的文档
  "version": "2.0.0",
  "tasks": [
    {
      "type": "cppbuild",
      "label": "C/C++: g++ 生成活动文件",
      "command": "/usr/bin/g++",
      "args": [
        "-g",
        "${file}",
        "-o",
        "${fileDirname}/${fileBasenameNoExtension}",
        // 配置新增开始
        "-I",
        "/usr/include/mysql", // 包含头文件目录
        "-L",
        "/usr/lib64/mysql", // 动态库目录
        "-lmysqlclient" // 导入的哪个库
        // 配置新增结束
      ],
      "options": {
        "cwd": "${workspaceFolder}"
      },
      "problemMatcher": [
        "$gcc"
      ],
      "group": {
        "kind": "build",
        "isDefault": true
      },
      "detail": "编译器: /usr/bin/g++"
    }
  ]
}
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Note: /usr/include/mysqland /usr/lib64/mysqlthese two directories need to be installed mysql-develbefore they exist, the specific installation stepshttps://centos.pkgs.org/7/mysql-5.7-x86_64/mysql-community-devel-5.7.24-1.el7.x86_64.rpm.html

• Tasks.json file configuration under window10

{
  "version": "2.0.0",
  "tasks": [
    {
      "type": "cppbuild",
      "label": "C/C++: cpp.exe 生成活动文件",
      "command": "L:\\mingw64\\bin\\cpp.exe",
      "args": [
        "-g",
        "${file}",
        "-o",
        "${fileDirname}\\${fileBasenameNoExtension}.exe"
      ],
      "options": {
        "cwd": "${workspaceFolder}"
      },
      "problemMatcher": [
        "$gcc"
      ],
      "group": "build",
      "detail": "编译器: L:\\mingw64\\bin\\cpp.exe"
    }
  ]
}
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3. To configure the c++ build file, view the configuration by running the command: Edit Configuration ( ) C / C ++from the Command Palette ( ) . This will open the C/C++ Configuration page. When you make a change here, VS Code writes it to a .vscode file called c_cpp_properties.json in the folder.Ctrl + Shift + PUIC / C ++UI

• c_cpp_properties.json file under linux

{
  "configurations": [
    {
      "name": "Linux",
      "includePath": [
        "${workspaceFolder}/**",
        "/usr/include/mysql/**" // 只修改这个地方，其他地方默认
      ],
      "defines": [],
      "compilerPath": "/usr/bin/gcc",
      "cStandard": "gnu17",
      "cppStandard": "gnu++14",
      "intelliSenseMode": "linux-gcc-x64"
    }
  ],
  "version": 4
}

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• c_cpp_properties.json file under window10

{
  "configurations": [
    {
      "name": "Win32",
      "includePath": [
        "${workspaceFolder}/**",
        "F:/MySql/mysql-5.7.24-winx64/include/**"
      ],
      "defines": [
        "_DEBUG",
        "UNICODE",
        "_UNICODE"
      ],
      "compilerPath": "L:\\mingw64\\bin\\gcc.exe",
      "cStandard": "gnu17",
      "cppStandard": "gnu++14",
      "intelliSenseMode": "windows-gcc-x64"
    }
  ],
  "version": 4
}
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The above is all the configuration. Ctrl+Shift+BAfter compiling, you can see the effect by executing the compiled file under the command line.