Question

用qt 调用 mysql 里面api, 只是mysql_init(&mysql); 程序就跳出了,是什么问题

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我的头文件是包含好了
我添加到库文件是libmysql.lib(应该没有包含错吧)

我的 IDE是Qt5.3
MYSQL 是 5.6
问题是
我只要调用
mysql_init(&mysql);
就立马程序结束了`````
提示如下
Starting C:\Users\Administrator.PC--20130815UUQ\Desktop\c\build-mysqlagain-Desktop_Qt_5_2_0_MinGW_32bit-Debug\debug\mysqlconsule.exe...

C:\Users\Administrator.PC--20130815UUQ\Desktop\c\build-mysqlagain-Desktop_Qt_5_2_0_MinGW_32bit-Debug\debug\mysqlconsule.exe exited with code -1073741515
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但是如果我注释掉
mysql_init(&mysql);
就可以运行了

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以下是我的源码

#include <QCoreApplication>
#include <winsock2.h>
#include <mysql.h>
#include <QDebug>
#include <QString>

int main(int argc, char *argv[])
{

QCoreApplication a(argc, argv);

qDebug ()<<"hi";

MYSQL mysql;

mysql_init(&mysql);

return a.exec();
}
我是照着百度的http://baike.baidu.com/view/8038006.htm?fr=aladdin
和链接上的源码一样啊``````````
以下是百度源码```````````````````````````
#include<stdio.h>
#include<mysql.h>
intmain()
{
MYSQLmysql;
mysql_init(&mysql);
if(!mysql_real_connect(&mysql,"host","user","passwd","database",0,NULL,0))
{
fprintf(stderr,"Failedtoconnecttodatabase:Error:%s\\n",mysql_error(&mysql));
}
mysql_close(mysql);
return0;
}
``````````````````````````````````````````````````````````````````````````````````````
不知道是不是包含库文件包含错了`````````````````````
pro
文件里是
win32:CONFIG(release, debug|release): LIBS += -L$$PWD/D:/mysql/new/lib/ -llibmysql
else:win32:CONFIG(debug, debug|release): LIBS += -L$$PWD/D:/mysql/new/lib/ -llibmysqld

INCLUDEPATH += $$PWD/D:/mysql/new/include
DEPENDPATH += $$PWD/D:/mysql/new/include

````````````````````````````````````
我刚刚去看了一下https://qt-project.org/forums/viewthread/14724

他说是库文件包含不对````
可是我包含错了吗`````````````````````````

Answer 1

64位dll强上32位MySql吧.....

Answer 2

dll加了么?
qt 不是有sql类么，这些类可以操作各种数据库的啊。

追问

加了lib和头文件，我的编译器是mingw，没有加dll不会装mysql的driver
qt上说用那个类要mysqldriver
总是说连不上`````````````````````提示driver notv load

追答

这里的驱动实际上就是dll，qt一般自带了 几个驱动，肯定是有mysql的，如果没有可自行编译一个。
你装mysql的时候可能会自带SKD包，其中就有.h文件lib文件,和运行时所需的dll，qt可以用这个SDK编译成自己的MYSQL驱动，方法网上百度就有。
qt的plugins/sqldrivers 目录下就有mysql驱动，你也可以查下你的qt所有驱动，
QStringList QSqlDatabase::drivers()；这个静态函数返回所有的驱动。

追问

用qmysql::drivers返回有mysql，可是一用就说driver not loaded，崩溃啊我不知道是我的库的问题还是我设置问题，或者是driver问题

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究竟是driver是dll 还是什么 啊

如果是dll的话

我有dll啊```````