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