Re: error C2678: binary '=' - C / C++ / MFC Discussion Boards

Re: error C2678: binary '='

Maximilien13-Dec-12 7:00

Maximilien

13-Dec-12 7:00

What line is line 44 ?

Nihil obstat

Re: error C2678: binary '='

alaaan7313-Dec-12 7:18

alaaan73

13-Dec-12 7:18

this one

ID=ss.substr(0,2)+s;

Re: error C2678: binary '='

Chris Meech13-Dec-12 7:30

Chris Meech

13-Dec-12 7:30

On line 44, you can not assign anything to the "const string ID". Are you sure the assingment isn't supposed to be ID_sn instead as it is public and not a const? Smile | :)

Chris Meech
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Re: error C2678: binary '='

alaaan7313-Dec-12 7:52

alaaan73

13-Dec-12 7:52

i change it to this

ID_sn()=ss.substr(0,2)+s;

and the previous error solved
BUT i got another error :

1>Reservation.obj : error LNK2019: unresolved external symbol "public: __thiscall Passenger::Passenger(void)" (??0Passenger@@QAE@XZ) referenced in function "public: __thiscall Reservation::Reservation(class std::basic_string<char,struct std::char_traits<char="">,class std::allocator<char> >,long,class std::basic_string<char,struct std::char_traits<char="">,class std::allocator<char> >,bool)" (??0Reservation@@QAE@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@J0_N@Z)

Re: error C2678: binary '='

Chris Meech13-Dec-12 8:17

Chris Meech

13-Dec-12 8:17

You are missing a Passenger ctor in your cpp file that is used by one of your Reservation ctors. Smile | :)

Re: error C2678: binary '='

alaaan7313-Dec-12 8:59

alaaan73

13-Dec-12 8:59

can you help me how can i add the passenger constructor in the cpp file

this is the passenger constructor :

#include <iostream>
#include "Passenger.h"
using namespace std;

Passenger::Passenger(string a="",string b="",long c=0)//Constructor that initializes the data members to given parameters
{
	setPassengerName(a);
	setPassportNumber(b);
	setContactNumber(c);
} //end constuctor Passenger body

many thanks

Re: error C2678: binary '='

Chris Meech13-Dec-12 9:06

Chris Meech

13-Dec-12 9:06

Try this.

Passenger::Passenger()
{
}

This ctor for Passenger is used by the Reservation class. Smile | :)

Re: error C2678: binary '='

alaaan7313-Dec-12 9:24

alaaan73

13-Dec-12 9:24

its WORK

but it seems i will have infinite No. of errors
when i got the last error i got another LNK2019 error with it, but i thought if i solve one of them the other will be solved also , and my thoughts was wrong

this is the other error :
1>Reservation.obj : error LNK2019: unresolved external symbol "public: class std::basic_string<char,struct std::char_traits<char="">,class std::allocator<char> > __thiscall Reservation::ID_sn(void)" (?ID_sn@Reservation@@QAE?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@XZ) referenced in function "public: class std::basic_string<char,struct std::char_traits<char="">,class std::allocator<char> > __thiscall Reservation::getReservationNumber(void)" (?getReservationNumber@Reservation@@QAE?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@XZ)

Re: error C2678: binary '='

Freak3014-Dec-12 0:48

Freak30

14-Dec-12 0:48

This time you get the error because you didn't define the funtion ID_sn().

I would just create a local std::string, assign to that one in line 44 and return it at the end.

Re: error C2678: binary '='

Richard MacCutchan13-Dec-12 7:33

Richard MacCutchan

13-Dec-12 7:33

You defined ID as const.

Also your <pre> tags are being ignored, have a look at the setting of the Treat my content as plain text, not as HTML checkbox, at the bottom of this page and/or in your settings page.

One of these days I'm going to think of a really clever signature.

Re: error C2678: binary '='

alaaan7313-Dec-12 7:55

alaaan73

13-Dec-12 7:55

i cant change anything in the header file
all my work will be on the source file only

process

messages13-Dec-12 3:45

messages

13-Dec-12 3:45

Hi everyone
I have three questions
1.why do I need to use of TEXT macro in my codes and if I remove it compiler shows error
2.why CreateProcess cant open test.txt while second parameter is command line and I have to write full path ("c:\\notepad.exe c:\\1.txt")
3.Do I need to use of WaitForSingleObject
STARTUPINFO si;
PROCESS_INFORMATION pi;
ZeroMemory( &si, sizeof(si) );
si.cb = sizeof (STARTUPINFO);
GetStartupInfo (&si);
si.dwFlags = STARTF_USESHOWWINDOW |STARTF_TITLEISAPPID ;
si.wShowWindow = SW_SHOWMAXIMIZED;
si.lpTitle=TEXT("Test");
if(CreateProcess(TEXT("c:\\notepad.exe"),TEXT("c:\\test.txt"),NULL,
NULL,FALSE,NULL,NULL,NULL,&si,&pi))
{
//WaitForSingleObject(pi.hProcess, INFINITE);
CloseHandle(pi.hProcess);
CloseHandle(pi.hThread);
}

Thanks

Re: process

David Crow13-Dec-12 4:14

David Crow

13-Dec-12 4:14

messages wrote:

1.why do I need to use of TEXT macro in my codes and if I remove it compiler shows error

See here.

messages wrote:

2.why CreateProcess cant open test.txt while second parameter is command line and I have to write full path ("c:\\notepad.exe c:\\1.txt")

Do you understand the difference between absolute vs. relative paths?

messages wrote:
3.Do I need to use of WaitForSingleObject

Only if you need to wait.

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Re: process

messages13-Dec-12 4:18

messages

13-Dec-12 4:18

Do you know your answers are great?
Thanks

exporting data from C++ to C

danielsutopo12-Dec-12 15:00

danielsutopo

12-Dec-12 15:00

Hi I have to program, one is in c++ I have compiled with VStudio 2010, and one in c compiled in gcc.

In c program, I need data which come from c++.
how to export data from c++ to C? does any one have the sample code for this one?

thankyou

Re: exporting data from C++ to C

Richard MacCutchan12-Dec-12 22:35

Richard MacCutchan

12-Dec-12 22:35

Data is data, it has nothing to do with what language is used to process it. Please try and explain your problem in more detail.

One of these days I'm going to think of a really clever signature.

Re: exporting data from C++ to C

danielsutopo15-Dec-12 13:45

danielsutopo

15-Dec-12 13:45

I have a program in C++ compile with Visual Studio 2010. This program is to get data from joystick, this joystick will control robot in server pc.
in this client PC I have udp client server in C compile with gcc.

I need to pass data from joystick program to udp client program.

How can I do that? data is in char format, and input udp have the same format.

are there any source code example to do that?

Re: exporting data from C++ to C

Richard MacCutchan15-Dec-12 20:59

Richard MacCutchan

15-Dec-12 20:59

Make a socket connection and send the data, suitably formatted, to your client. I don't understand what the problem is here, transferring data between clients and servers is how the entire world is run these days.

One of these days I'm going to think of a really clever signature.

Re: exporting data from C++ to C

danielsutopo16-Dec-12 11:50

danielsutopo

16-Dec-12 11:50

I have udp server client connection it is in C program, but the problem is, that my joystick program in client is in C++, I want to pass C++ data to client C program.

thank you

Re: exporting data from C++ to C

Richard MacCutchan16-Dec-12 21:47

Richard MacCutchan

16-Dec-12 21:47

There is no such thing as "C++ data", data is data, it's just a series of bytes. I cannot see how you are able to write C and C++ code and, apparently, understand UDP client/server, and yet do not understand this basic concept.

One of these days I'm going to think of a really clever signature.

Re: exporting data from C++ to C

Albert Holguin13-Dec-12 5:26

Albert Holguin

13-Dec-12 5:26

You need to read up on Interprocess Communications... and choose one that fits what you need most appropriately according to whether you expect the programs to be on the same machine, speed, reliability, platform dependence (or independence).

http://en.wikipedia.org/wiki/Inter-process_communication[^]
http://msdn.microsoft.com/en-us/library/windows/desktop/aa365574%28v=vs.85%29.aspx[^]

Overlaying Text over Video

SrivathsanRaghavan11-Dec-12 19:25

SrivathsanRaghavan

11-Dec-12 19:25

Hi all,

Can any one tell me How to overlay text over a video available, using Linux Commands.

I have tried with ffmepg tool, But I can't able to make it possible.

The Command I used was,

ffmpeg -i Input.avi drawtext="fontfile=/usr/share/fonts/truetype/freefont/FreeSans.ttf:text=HelloWorld:fontcolor=red@1.0:fontsize=70:x=00: y=40" -y Output.avi

An Error Message i got:

Unable to find a suitable output format for 'drawtext=fontfile=/usr/share/fonts/truetype/freefont/FreeSans.ttf:text=HelloWorld:fontcolor=red@1.0:fontsize=70:x=00: y=40'

Please let me know, How to work it out or some other Linux tool to overlay a text over Video.

Expecting for the best reply soon

Thanks & Regards
Srivathsan.K.R

Re: Overlaying Text over Video

Richard MacCutchan11-Dec-12 21:05

Richard MacCutchan

11-Dec-12 21:05

This is the C++ forum please try elsewhere.

One of these days I'm going to think of a really clever signature.

error C2065: 'xlSheetVisible' undeclared

ForNow11-Dec-12 10:18

ForNow

11-Dec-12 10:18

Looking at the documentation xlSheetVisible property

Assembly: Microsoft.Office.Tools.Excel (in microsoft.office.tools.excel.dll)

does this mean this property is exposed in excel.dll if so I only have the executable

thanks

Re: error C2065: 'xlSheetVisible' undeclared

Richard MacCutchan11-Dec-12 11:12

Richard MacCutchan

11-Dec-12 11:12

One of these days I'm going to think of a really clever signature.

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