C++向MySql数据库写数据

由于项目运用到数据库，就想着用C++来操作数据库。一开始准备用C++创建一个数据库的，但没找到方法。后来参考别人的博客，找到了向数据库中写数据的C++代码

#include<mysql.h>
#include<iostream>
#include<string>
#include<winsock.h>
#include<time.h>
#include<stdio.h>
using namespace std;
int main()
{

	if (mysql_library_init(0, NULL, NULL))
	{
		printf("could not initialize MySQL library\n");
		getchar();
		exit(1);
	}
	MYSQL mydata;
	mysql_init(&mydata);
	MYSQL *ret = mysql_real_connect(&mydata, "127.0.0.1", "root", "123456", "test", 0, NULL, 0);
	if (!ret)
	{
		printf("Failed to connect to database:%s\n", mysql_error(&mydata));
		getchar();
		exit(1);
	}
	int i;
	
	while (cin >> i)
	{
		time_t t ;
		struct tm current_time;
		time(&t);      //获取系统日期和时间
		localtime_s(¤t_time, &t);   //获取当地日期和时间
		string str;
		int year = 1900 + current_time.tm_year;
		int month = 1 + current_time.tm_mon;
		int day = 1 + current_time.tm_mday;
		int hour = current_time.tm_hour;
		int min = current_time.tm_min;
		int sec = current_time.tm_sec;
		int type = 1;
		string pass_rate = "true";
		double diatance_move = 1.0 / i;
		str = "insert into weldingworkpiece VALUES (";
		str += to_string(year);
		str += ",";
		str += to_string(month);
		str += ",";
		str += to_string(day);
		str += ",";
		str += to_string(hour);
		str += ",";
		str += to_string(min);
		str += ",";
		str += to_string(sec);
		str += ",'D:\\/吉纳尔\\/";
		str += to_string(year);
		str += "_";
		str += to_string(month);
		str += "_";
		str += to_string(day);
		str += "_";
		str += to_string(hour);
		str += "_";
		str += to_string(min);
		str += "_";
		str += to_string(sec);
		str += ".bmp',";
		str += "";
		str += to_string(type);        //型号
		str += ",";
		str += to_string(1);        //是否合格
		str += ",";
		str += to_string(diatance_move);        //偏移量
		str += ");";
		//cout << str.c_str() << endl;
		//const char* strl= str.c_str();
		int ret1 = mysql_query(&mydata, str.c_str());
		if (ret1 != 0)
		{
			printf("error:%s\n", mysql_error(&mydata));
			getchar();
			system("pause");
		}

	}

        MYSQL_RES *results;
	MYSQL_ROW record;
	mysql_query(&mydata, "SELECT * FROM weldingworkpiece");
	results = mysql_store_result(&mydata);
	//if (results == NULL) cout << "asd" << endl;
	int record_num;
	record_num = mysql_num_rows(results);
	cout << record_num << endl;
	while ((record = mysql_fetch_row(results)) != NULL) {
		printf("%s - %s \n", record[0], record[6]);

	}

        mysql_close(&mydata);
	mysql_server_end();

	system("pause");
	return 0;
}