c++ 连接mysql数据库

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一、根据程序需要下载安装32位mysql数据库

连接：https://cdn.mysql.com//Downloads/MySQL-5.7/mysql-5.7.20-win32.zip

二、配置程序项目属性

1.指定包含头文件路径：
Project->properties->C/C++->Additional Include Directories->(这里指定mysql各种头文件的目录，我的是mysql文件夹里的include)
2.指定lib路径：
Project->properties->Linker->General->Additional Library Directories->(这里是libmysql.lib所在路径，我的是在lib里)
3.添加lib：
Project->properties->Linker->Input->Additional Dependencies->增加libmysql.lib
4.修改配置：
Build->Configuration Manager->Active solution platform->x32

三、测试代码

#include <winsock.h>
#include <stdlib.h>
#include <mysql.h> 
#pragma comment(lib,"libmysql.lib")
#pragma comment(lib, "ws2_32.lib")

//必备的一个数据结构  
MYSQL mydata;

//初始化数据库
void initMysql() {
	//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;
	}

	//初始化数据结构  
	if (NULL != mysql_init(&mydata)) {
		cout << "mysql_init() succeed" << endl;
	}
	else {
		cout << "mysql_init() failed" << endl;
		return;
	}

	//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;
	}

	//连接数据库 
	if (NULL != mysql_real_connect(&mydata, "localhost", "root", "", "chartdb", 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;
	}
}

// 查询数据库
void queryData() {
	string sqlstr;
	sqlstr = "select * from future_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;
	}
}

int main()
{
       // 初始化
        initMysql();
       // 查询
	queryData();

         return 0;
}