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Trying to study MPEG Layer-III encoder - getting "expected '=', ',', ';', 'asm' or '__attribute__' before" errors

Answer 1

A:

Looks like bool is not defined. Include stdbool.h

Amarghosh 2010-10-18 12:48:52

Just add a `typedef int bool;` before the line that gives this error to confirm that `bool` indeed is the issue. If it is, remove the typedef, add `#inculde <stdbool.h>` (or any other qt specific types header file that defines bool). With respect to how it was defined in some places and not some other places, its hard to say anything without seeing more code.

Amarghosh 2010-10-18 12:58:53

I see now. In types.h, it had #ifndef booltypedef unsigned char bool;#endifand it complained about redeclaring bool which is c++ type so i had to comment it. Now i uncommented it and its working all right.

Istrebitel 2010-10-18 13:03:35

Okay,then, what do i do if i want to use QT's features? I mean, previously, i had main.cpp file that was including main.c file and i renamed main.c "main" to "mainc" and called mainc from main in main.cpp, which leaded to that "redeclaration of bool" problem. Now i removed main.cpp from project, made main.c the first file and it compiles fine. But if i want to, say, add QT gui to it, what do i do? How do i fix the problem of C not knowing about bool but c++ forbidding me to define it?

Istrebitel 2010-10-18 13:05:23

Don't include a `.c` file in another file - include `.h` files in c and cpp files. Are you compiling it as c or cpp?

Amarghosh 2010-10-18 13:09:21

So i should do like this: - starting from new blank console project in QT- add main.h, include it from main.cpp- in main.h, include main.c- run mainc(former main or main.c) from main.cpp's main?

Istrebitel 2010-10-18 13:11:34

sorry this form does not allow line breaks and has very little char limit so i will reply in an "answer". I did got it to compile and work but my goal is to incorporate the code into my QT project. For that i did as i stated before and this leads to new errors.

Istrebitel 2010-10-18 13:18:11

I'm not sure what you're trying to achieve by including `main.c` in `main.h` - the question has changed considerably from its initial form, which was about the undefined bool part. I say you either edit the question or ask a new question on how to compile and run the downloaded qt code, citing the issues you're facing. You can't have newlines in comments - you can edit your question and add information to it though.

Amarghosh 2010-10-18 13:28:45

okay sorry i'll make a new question then

Istrebitel 2010-10-18 13:40:15

by including main.c in main.h i am trying to achieve to be able to use functions from main.c in my QT program. What i am trying to achieve is to test if i can use the code that encodes an mp3 from the shine encoder in QT application. Here is the new question link http://stackoverflow.com/questions/3959783/trying-to-study-shine-mpeg-layer-iii-encoder-getting-redeclaration-of-c-buil

Istrebitel 2010-10-18 13:46:31

Answer 2

A:

I made new blank console project in QT and added as existing all the files that previously successfully compiled for me

Okay, this is my main.cpp:

#include <QtCore/QCoreApplication>
#include "main.h"
int main(int argc, char *argv[])
{
//    QCoreApplication a(argc, argv);
//    return a.exec();
    mainc(argc,argv);
}

this is main.h:

#ifndef MAIN_H
#define MAIN_H
#include "main.c"
#endif // MAIN_H

everything else is untouched (i mean, without those two files it compiled successfully and worked)

I am now getting error at this part

#ifndef bool
typedef unsigned char bool;   <--- "redeclaration of C++ built-in type 'bool'"
#endif

Istrebitel 2010-10-18 13:17:34

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Trying to study MPEG Layer-III encoder - getting "expected '=', ',', ';', 'asm' or 'attribute' before" errors

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