初学Qt之--在Qt中调用外部C语言模块

小咪咪 2024-02-17 17:13 46阅读 0赞

原地址：blog.csdn.net/zgrjkflmkyc/article/details/8521953

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：

**\[cpp\]** [ view plain][view plain] [ copy][view plain]

1.  /\*\*\*\*\*\*\*\*\*\*Test.c\*\*\*\*\*\*\*\*\*\*/
2.  /\*\*\*\*\*\*\*\*\*\*用gcc编译后生产那个的可执行文件test放在..../invokec/C/目录下\*\*\*\*\*\*\*\*\*\*/
3.  
4.  \#include <stdio.h>
5.  
6.  int main(int argc,char \*argv\[\])
7.  \{
8.  printf("Hello,I am a C program!\\n");
9.  printf("now,I am invoked by a program called Qt!\\nfollowing are the parameters that Qt sends to me:\\n");
10. printf("%s\\n",argv\[0\]);
11. printf("%s\\n",argv\[1\]);
12. printf("%s\\n",argv\[2\]);
13. return 0;
14. \}

Qt代码：

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1.  /\*\*\*\*\*\*\*\*MyTest.h\*\*\*\*\*\*\*\*\*\*\*/
2.  
3.  \#ifndef MYTEST\_H\_
4.  \#define MYTEST\_H\_
5.  
6.  \#include <QtGui/QWidget>
7.  \#include <QtGui/QPushButton>
8.  
9.  class MyTest : public QWidget
10. \{
11. Q\_OBJECT
12. public:
13. MyTest();
14. ~MyTest();
15. public slots:
16. void invokeC();
17. private:
18. QPushButton \*pb;
19. \};
20. 
21. \#endif

**\[cpp\]** [ view plain][view plain] [ copy][view plain]

1.  /\*\*\*\*\*\*\*\*MyTest.cpp\*\*\*\*\*\*\*\*\*\*/
2.  
3.  \#include "MyTest.h"
4.  \#include <QtCore/QProcess>
5.  \#include <iostream>
6.  \#include <QtCore/QTextStream>
7.  \#include <QtCore/QIODevice>
8.  
9.  MyTest::MyTest()
10. :QWidget()
11. \{
12. this\->setGeometry(0,0,200,50);
13. pb=new QPushButton("点击调用C程序",this);
14. pb->setGeometry(0,0,200,50);
15. connect(pb,SIGNAL(clicked()),this,SLOT(invokeC()));
16. \}
17. 
18. MyTest::~MyTest()
19. \{
20. \}
21. 
22. void MyTest::invokeC()
23. \{
24. QProcess \*process=new QProcess();
25. QStringList str;
26. str.clear();
27. str << "a" << "b" ;
28. process->start("../C/test",str);
29. process->waitForStarted();
30. process->waitForFinished();
31. QByteArray qb=process->readAll();
32. QString str22(qb);
33. QTextStream cout(stdout);
34. cout<<str22<<endl;
35. \}

**\[cpp\]** [ view plain][view plain] [ copy][view plain]

1.  /\*\*\*\*\*\*\*\*\*\*\*Main.cpp\*\*\*\*\*\*\*\*\*\*\*\*/
2.  /\*\*\*\*\*\*\*编译后放在...../invokeC/Qt/目录下\*\*\*\*\*\*\*\*\*\*\*\*/
3.  
4.  \#include <QtGui/QApplication>
5.  \#include <QtCore/QTextCodec>
6.  \#include "MyTest.h"
7.  
8.  int main(int argc,char \*argv\[\])
9.  \{
10. QApplication a(argc,argv);
11. QTextCodec \*codec = QTextCodec::codecForLocale();
12. QTextCodec::setCodecForCStrings(codec);
13. a.setFont(QApplication::font());
14. 
15. MyTest \*mt=new MyTest;
16. mt->show();
17. return a.exec();
18. \}

运行结果：

![1358660166_3257.png][]

[view plain]: http://blog.csdn.net/zgrjkflmkyc/article/details/8521953#
[1358660166_3257.png]: https://img-my.csdn.net/uploads/201301/20/1358660166_3257.png