调用外部已编译好的C语言模块，传递参数并将结果返回打印出来。
C语言模块代码：
/**********Test.c**********/
/**********用gcc编译后生产那个的可执行文件test放在..../invokec/C/目录下**********/
#include
int main(int argc,char *argv[])
{
printf("Hello,I am a C program!\n");
printf("now,I am invoked by a program called Qt!\nfollowing are the parameters that Qt sends to me:\n");
printf("%s\n",argv[0]);
printf("%s\n",argv[1]);
printf("%s\n",argv[2]);
return 0;
}
Qt代码：
/********MyTest.h***********/
#ifndef MYTEST_H_
#define MYTEST_H_
#include
#include
class MyTest : public QWidget
{
Q_OBJECT
public:
MyTest();
~MyTest();
public slots:
void invokeC();
private:
QPushButton *pb;
};
#endif
/********MyTest.cpp**********/
#include "MyTest.h"
#include
#include
#include
#include
MyTest::MyTest()
:QWidget()
{
this->setGeometry(0,0,200,50);
pb=new QPushButton("点击调用C程序",this);
pb->setGeometry(0,0,200,50);
connect(pb,SIGNAL(clicked()),this,SLOT(invokeC()));
}
MyTest::~MyTest()
{
}
void MyTest::invokeC()
{
QProcess *process=new QProcess();
QStringList str;
str.clear();
str << "a" << "b" ;
process->start("../C/test",str);
process->waitForStarted();
process->waitForFinished();
QByteArray qb=process->readAll();
QString str22(qb);
QTextStream cout(stdout);
cout<
}
/***********Main.cpp************/
/*******编译后放在...../invokeC/Qt/目录下************/
#include
#include
#include "MyTest.h"
int main(int argc,char *argv[])
{
QApplication a(argc,argv);
QTextCodec *codec = QTextCodec::codecForLocale();
QTextCodec::setCodecForCStrings(codec);
a.setFont(QApplication::font());
MyTest *mt=new MyTest;
mt->show();
return a.exec();
}
运行结果：
(--------完--------)
