C/C++连接MySQL数据库“经典”例子！

废话不多说，直接撸代码！！！

      //下面的代码是一个实现C++连接MYSQL数据库的很好的例子
      //这里用了建表，插入，检索，删表等常用功能
      //我用VC++6.0生成，已经成功连接了。
      //在VC++6.0中要想把做一下两步准备工作才可以。
      //(1)Tools->Options->Directories->Include files中添加C:\Program Files\MySQL\MySQL Server 6.0\include
      //(2)Tools->Options->Directories->Library files中添加C:\Program Files\MySQL\MySQL Server 6.0\lib\opt
      //其实就是将头文件和库文件包含进来
      //我觉得这个例子写的很好，再结合自己的试验，特地介绍给大家！
      #include <winsock.h>
      #include <iostream>
      #include <string>
      #include <mysql.h>
      using namespace std;
      #pragma comment(lib, "ws2_32.lib")
      #pragma comment(lib, "libmysql.lib")
      //单步执行，不想单步执行就注释掉
      #define STEPBYSTEP
      int main() {
      cout << "****************************************" << endl;
      #ifdef STEPBYSTEP
       system("pause");
      #endif
      //必备的一个数据结构
       MYSQL mydata;
      //初始化数据库
      if (0 == mysql_library_init(0, NULL, NULL)) {
      cout << "mysql_library_init() succeed" << endl;
       } else {
      cout << "mysql_library_init() failed" << endl;
      return -1;
       }
      #ifdef STEPBYSTEP
       system("pause");
      #endif
      //初始化数据结构
      if (NULL != mysql_init(&mydata)) {
      cout << "mysql_init() succeed" << endl;
       } else {
      cout << "mysql_init() failed" << endl;
      return -1;
       }
      #ifdef STEPBYSTEP
       system("pause");
      #endif
      //在连接数据库之前，设置额外的连接选项
      //可以设置的选项很多，这里设置字符集，否则无法处理中文
      if (0 == mysql_options(&mydata, MYSQL_SET_CHARSET_NAME, "gbk")) {
      cout << "mysql_options() succeed" << endl;
       } else {
      cout << "mysql_options() failed" << endl;
      return -1;
       }
      #ifdef STEPBYSTEP
       system("pause");
      #endif
      //连接数据库
      if (NULL
       != mysql_real_connect(&mydata, "localhost", "root", "test", "test",
      3306, NULL, 0))
      //这里的地址，用户名，密码，端口可以根据自己本地的情况更改
       {
      cout << "mysql_real_connect() succeed" << endl;
       } else {
      cout << "mysql_real_connect() failed" << endl;
      return -1;
       }
      #ifdef STEPBYSTEP
       system("pause");
      #endif
      //sql字符串
      string sqlstr;
      //创建一个表
       sqlstr = "CREATE TABLE IF NOT EXISTS user_info";
       sqlstr += "(";
       sqlstr +=
      "user_id INT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY COMMENT 'Unique User ID',";
       sqlstr +=
      "user_name VARCHAR(100) CHARACTER SET gb2312 COLLATE gb2312_chinese_ci NULL COMMENT 'Name Of User',";
       sqlstr +=
      "user_second_sum INT UNSIGNED NOT NULL DEFAULT 0 COMMENT 'The Summation Of Using Time'";
       sqlstr += ");";
      if (0 == mysql_query(&mydata, sqlstr.c_str())) {
      cout << "mysql_query() create table succeed" << endl;
       } else {
      cout << "mysql_query() create table failed" << endl;
       mysql_close(&mydata);
      return -1;
       }
      #ifdef STEPBYSTEP
       system("pause");
      #endif
      //向表中插入数据
       sqlstr =
      "INSERT INTO user_info(user_name) VALUES('公司名称'),('一级部门'),('二级部门'),('开发小组'),('姓名');";
      if (0 == mysql_query(&mydata, sqlstr.c_str())) {
      cout << "mysql_query() insert data succeed" << endl;
       } else {
      cout << "mysql_query() insert data failed" << endl;
       mysql_close(&mydata);
      return -1;
       }
      #ifdef STEPBYSTEP
       system("pause");
      #endif
      //显示刚才插入的数据
       sqlstr = "SELECT user_id,user_name,user_second_sum FROM user_info";
       MYSQL_RES *result = NULL;
      if (0 == mysql_query(&mydata, sqlstr.c_str())) {
      cout << "mysql_query() select data succeed" << endl;
      //一次性取得数据集
       result = mysql_store_result(&mydata);
      //取得并打印行数
      int rowcount = mysql_num_rows(result);
      cout << "row count: " << rowcount << endl;
      //取得并打印各字段的名称
      unsigned int fieldcount = mysql_num_fields(result);
       MYSQL_FIELD *field = NULL;
      for (unsigned int i = 0; i < fieldcount; i++) {
       field = mysql_fetch_field_direct(result, i);
      cout << field->name << "\t\t";
       }
      cout << endl;
      //打印各行
       MYSQL_ROW row = NULL;
       row = mysql_fetch_row(result);
      while (NULL != row) {
      for (int i = 0; i < fieldcount; i++) {
      cout << row[i] << "\t\t";
       }
      cout << endl;
       row = mysql_fetch_row(result);
       }
       } else {
      cout << "mysql_query() select data failed" << endl;
       mysql_close(&mydata);
      return -1;
       }
      #ifdef STEPBYSTEP
       system("pause");
      #endif
      //删除刚才建的表
       sqlstr = "DROP TABLE user_info";
      if (0 == mysql_query(&mydata, sqlstr.c_str())) {
      cout << "mysql_query() drop table succeed" << endl;
       } else {
      cout << "mysql_query() drop table failed" << endl;
       mysql_close(&mydata);
      return -1;
       }
       mysql_free_result(result);
       mysql_close(&mydata);
       mysql_server_end();
       system("pause");
      return 0;
      }
  
 

文章来源: blog.csdn.net，作者：allinallinallin，版权归原作者所有，如需转载，请联系作者。

原文链接：blog.csdn.net/to_Baidu/article/details/53819829