VS2012中 C++ API 连接mysql 6.0

#include <windows.h>
#include <winsock.h>
#include <mysql.h>
#include <iostream>
#include <string>

using namespace std;

#define DEBUG

int main(int argv, char* arvs[]) {
    MYSQL mydata;
    if(mysql_library_init(0, NULL, NULL) == 0) {
        cout << "mysql_library_init() succeed" << endl;
    }
    else {
        cout << "mysql_library_init() failed" << endl;
        return  -1;
    }

#ifdef DEBUG
    system("pause");
#endif

    if(mysql_init(&mydata) != nullptr) {
        cout << "mysql_init() succeed" << endl;
    }
    else {
        cout << "mysql_init() failed" << endl;
        return  -1;
    }
    
#ifdef DEBUG
    system("pause");
#endif

    if(mysql_options(&mydata, MYSQL_SET_CHARSET_NAME, "gbk") == 0) {
        cout << "mysql_options() succeed" << endl;
    }
    else {
        cout << "mysql_options() failed" << endl;
        return  -1;
    }

#ifdef DEBUG
    system("pause");
#endif

    if(mysql_real_connect(&mydata, "localhost", "root", "momo", "adserving",
        3306, NULL, 0) != nullptr) {
        cout << "mysql_real_connect() succeed" << endl;
    }
    else {
        cout << "mysql_real_connect() failed" << endl;
        return  -1;
    }

#ifdef DEBUG
    system("pause");
#endif

    string sqlstr;
    sqlstr = "create table if not exists user_info\
              (\
                user_id int unsigned not null auto_increment primary key comment 'Unique User ID',\
                user_name varchar(100) character set gb2312 collate\
                    gb2312_chinese_ci NULL comment 'Name of User',\
                user_second_sum int unsigned not null default 0 comment 'The Sumation of Using Time'\
                )";
    if(mysql_query(&mydata, sqlstr.c_str()) == 0) {
        cout << "mysql_query() create table succed" << endl;
    }
    else {
        cout << "mysql_query() create table failed" << endl;
        mysql_close(&mydata);
        return  -1;
    }

#ifdef DEBUG
    system("pause");
#endif

    sqlstr = "insert into user_info values (1, '中文', 11)";
    if(mysql_query(&mydata, sqlstr.c_str()) == 0) {
        cout << "mysql_query() insert data succeed" << endl;
    }
    else {
        cout << "mysql_query() insert data failed" << endl;
        mysql_close(&mydata);
        return  -1;
    }
#ifdef DEBUG
    system("pause");
#endif

    sqlstr = "select user_id, user_name, user_second_sum from user_info";
    MYSQL_RES *result = nullptr;
    if(mysql_query(&mydata, sqlstr.c_str()) == 0) {
        cout << "mysql_query() select data succeed" << endl;
        result = mysql_store_result(&mydata);
        int rowcount = mysql_num_rows(result);
        cout << "row count: " << rowcount << endl;
        size_t fieldcount = mysql_num_fields(result);
        MYSQL_FIELD *field = NULL;
        for(size_t i = 0; i < fieldcount; i++) {
            field = mysql_fetch_field_direct(result, i);
            cout << field->name << "\t\t";
        }
        cout << endl;
        MYSQL_ROW row = nullptr;
        row = mysql_fetch_row(result);
        while(row != nullptr) {
            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 DEBUG
    system("pause");
#endif

    sqlstr = "drop table user_info";
    if(mysql_query(&mydata, sqlstr.c_str()) == 0) {
        cout << "mysql_query() drop table succed" << 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;
}