main.cpp

qt中写动态库和调用动态库的简单例子,说明怎么用qt4产后运态库

#include <qapplication.h>
#include <QPushButton>
#include <QDebug>
//动态调用库文件，不需要#include<lib.h>
#include <QLibrary>
#include "lib.h"  //静态调用库
int main(int argc, char *argv[])
{
    QApplication app(argc, argv);

    QPushButton hello("Hello world!zwd");
    hello.resize(400, 200);
/* 动态调用库
 	QLibrary mylib("./lib.o");
	typedef int (*TypeFunction)(int, int);
 	TypeFunction mysum = (TypeFunction) mylib.resolve("mysum");
	TypeFunction myminus = (TypeFunction) mylib.resolve("myminus");
 	if (mysum)
     qDebug()<<"mysum="<<mysum(1,2);
 	else
     qDebug()<<"can not find mysum";
 	if (myminus)
     qDebug()<<"myminus="<<myminus(1,2);
 	else
     qDebug()<<"can not find myminus";
*/
	ABC a;
	qDebug()<<"3+2="<<a.mysum(3,2);
	qDebug()<<"3-2="<<a.myminus(3,2);
	qDebug()<<"3*2="<<mymult(3,2);
    hello.show();
    return app.exec();
}