native已退出，代码为0（0x0） [英] native has exited with code 0(0x0)

问题描述

大家好我正在使用serialport programm，但在运行programmin时会出现以下错误。请问任何人请帮帮我

Hello every one i am working on serialport programm , but while running programmin its give the following error. Can any one please help me out please

/** Serial.cpp
 *
 *
 */

#include <iostream>
using namespace std;
#include <windows.h>
#include <tchar.h>
#include <crtdbg.h>

#include "serialtestdll.h"

int WINAPI _tWinMain
          (
           HINSTANCE /*hInst*/, 
           HINSTANCE /*hInstPrev*/, 
           LPTSTR    /*lptszCmdLine*/, 
          int       /*nCmdShow*/
          ){
}

Serial::Serial(tstring &commPortName, int baudeRate)
{
	commHandle = CreateFile(commPortName.c_str(), GENERIC_READ|GENERIC_WRITE, 0,NULL, OPEN_EXISTING, 
		0, NULL);

	if(commHandle == INVALID_HANDLE_VALUE) 
	{
		throw("ERROR: Could not open com port");
	}
	else 
	{
		// set timeouts
		COMMTIMEOUTS cto = { MAXDWORD, 0, 10,100, 500};
		DCB dcb;
		if(!SetCommTimeouts(commHandle,&cto))
		{
			Serial::~Serial();
			throw("ERROR: Could not set com port time-outs");
		}

		// set DCB
		memset(&dcb,0,sizeof(dcb));
		dcb.DCBlength = sizeof(dcb);
		dcb.BaudRate = 9600;
		dcb.fBinary = 1;
		dcb.fDtrControl = DTR_CONTROL_ENABLE;
		dcb.fRtsControl = RTS_CONTROL_ENABLE;

		dcb.Parity = NOPARITY;
		dcb.StopBits = ONESTOPBIT;
		dcb.ByteSize = 8;

		if(!SetCommState(commHandle,&dcb))
		{
			Serial::~Serial();
			throw("ERROR: Could not set com port parameters");
		}
	}
}

Serial::~Serial()
{
	CloseHandle(commHandle);
}

double Serial::write(const char *buffer)
{
	char cmd[] = "!GV\r";
	DWORD numWritten;
	WriteFile(commHandle, cmd, 5, &numWritten, NULL); 

	return numWritten;
}

int Serial::write(const char *buffer, int buffLen)
{
	char cmd[] = "!GV\r";
	DWORD numWritten;
	
	WriteFile(commHandle, cmd, 5, &numWritten, NULL); 

	return numWritten;
}

int Serial::read(char *buffer, int buffLen, bool nullTerminate)
{
	DWORD numRead;
	if(nullTerminate)
	{
	--buffLen;
	}

	BOOL ret = ReadFile(commHandle, buffer, buffLen, &numRead, NULL);

	if(!ret)
	{
		return 0;
	}

	if(nullTerminate)
	{
		buffer[numRead] = '\r';
	}

	return numRead;
}

#define FLUSH_BUFFSIZE 10

void Serial::flush()
{
	char buffer[FLUSH_BUFFSIZE];
	int numBytes = read(buffer, FLUSH_BUFFSIZE, false);
	while(numBytes != 0)
	{
		numBytes = read(buffer, FLUSH_BUFFSIZE, false);
	}
}

推荐答案

您的 _tWinMain 功能是空的并立即返回。您必须向函数体添加一些代码。

Your _tWinMain function is empty and returns immediately. You must add some code to the function body.

添加到Jochen Arndt所说的内容：当您获得应用程序返回代码为零（如您所做）时，表示程序已成功完成 - 任何非零值都是错误代码。



您的应用程序入口点 _tWinMain 什么都不做，所以它成功完成，您将获得零返回代码。定义一个类不会创建它的实例，也不会执行该类中的任何代码，除非你的代码明确指示它应该执行。

To add to what Jochen Arndt says: when you get an app return code of zero (as you do) that means "Program completed successfully" - any non-zero value is an error code.

Your application entry point _tWinMain does nothing, so it completes successfully and you get a zero return code. Defining a class does not create an instance of it, nor does any of the code in that class get executed unless your code specifically instructs that it should.

你好每一个我都是新手c ++中的编程语言请告诉我如何设置实例

Hello every one i am very new to programming language in c++ please do let me know how can i cerate an instance

这篇关于native已退出，代码为0（0x0）的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！