將libmysql.dll文件拷貝到C:\Windows\System32文件夾下面,不然程序運行起來會找不到libmysql.dll,eclipse下面運行之後就會出現什麼也沒發生
#include <winsock.h>
#include <iostream>
#include <string>
#include <mysql.h>
using namespace std;
const char *host = "localhost";
const char *user = "root";
const char *passwd = "smartsys";
const char *db = "swadmin";
unsigned int port = 3306;
int main() {
MYSQL m_mysql;
//初始化數據庫
if (mysql_library_init(0, NULL, NULL) == 0) {
cout << "mysql類庫初始化成功" << endl;
} else {
cout << "mysql類庫初始化失敗" << endl;
return -1;
}
mysql_init(&m_mysql);
mysql_options(&m_mysql, MYSQL_SET_CHARSET_NAME, "gbk");
//連接數據庫
if (mysql_real_connect(&m_mysql, host, user, passwd, db, port, NULL,
0)!=NULL) {
cout << "數據庫連接成功" << endl;
} else {
cout << "數據庫連接失敗" << endl;
return -1;
}
string sql_str = "SELECT * FROM MENU";
MYSQL_RES *result = NULL;
if (mysql_query(&m_mysql, sql_str.c_str()) == 0) {
cout << "數據查詢成功" << endl;
result = mysql_store_result(&m_mysql);
int rowcount = mysql_num_rows(result);
cout << "查詢到的記錄數: " << rowcount << endl;
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;
MYSQL_ROW row = NULL;
row = mysql_fetch_row(result);
while (row != NULL) {
for (unsigned int i = 0; i < fieldcount; i++) {
cout << row[i] << "\t\t";
}
cout << endl;
row = mysql_fetch_row(result);
}
} else {
cout << "查詢數據失敗" << endl;
mysql_close(&m_mysql);
return -1;
}
mysql_free_result(result);
mysql_close(&m_mysql);
mysql_server_end();
return 0;
}