install sqlite

[marquessbr]

Hi all!

Im newbi in qt and need to use to developer sqlite apps, but how I can use de designer with it?

tank's

peace!

[amleto]

Why should sqlite be in designer? Database is not gui/widget.

[marquessbr]

Why should sqlite be in designer? Database is not gui/widget.

hi my friend!
thanks for replying
but I'm having difficulty using the QT interface, I downloaded a practical tutorial on how to create a calculator to start, but the author asked to create the interface of the calculator, I did it without problems following the example he gave, but he asked to create a file ".h" but where should I create this file? in an ordinary text editor and save it in the folder where I recorded the project?

thank you!

[Lesiok]

marquessbr, do not understand me wrong, but I think first you have to study a tutorial on programming in C / C++. Without it, the moment you come back here with another question on the basis of C++

[marquessbr]

marquessbr, do not understand me wrong, but I think first you have to study a tutorial on programming in C / C++. Without it, the moment you come back here with another question on the basis of C++

hi my friend!
I have no problem in programming in C / C++, the problem I'm having is with the interface of QT, which is a bit strange for me that always programmed in Delphi and Lazarus / FPC, but thank you, even as I followed the tutorial and finished the project but gave some strange errors and now means no time to see how to solve.

Thanks anyway

[Lesiok]

Sorry marquessbr but You have problems with C/C++. You are asking what is h file and hwo to create it.

[amleto]

use Qt Creator and add files to the projects from there.

[marquessbr]

Hi leslok, I did not ask what is a ".h" file, I know with it is, I asked where it should be saved in a project QT, I do this already solved, and yes, I'm having trouble with C/C++, but it is because of error shown below, which is a copy of the output from my terminal when I'm compiling with qmake.

-----------------------------------------------------------------------------------------------
armando@odin-lap:~/projects/qt/calc$ qmake -project
armando@odin-lap:~/projects/qt/calc$ qmake
armando@odin-lap:~/projects/qt/calc$ make
g++ -c -m64 -pipe -O2 -Wall -W -D_REENTRANT -DQT_WEBKIT -DQT_NO_DEBUG -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED -I/usr/share/qt4/mkspecs/linux-g++-64 -I. -I/usr/include/qt4/QtCore -I/usr/include/qt4/QtGui -I/usr/include/qt4 -I. -I. -I. -o main.o main.cpp
In file included from main.cpp:2:0:
myCalc.h:5:1: erro: stray ‘\302’ in program
myCalc.h:5:1: erro: stray ‘\240’ in program
myCalc.h:6:1: erro: stray ‘\302’ in program
myCalc.h:6:1: erro: stray ‘\240’ in program
myCalc.h:6:1: erro: stray ‘\302’ in program
myCalc.h:6:1: erro: stray ‘\240’ in program
myCalc.h:6:1: erro: stray ‘\302’ in program

...
...

main.cpp:8:2: erro: stray ‘\255’ in program
main.cpp:9:2: erro: stray ‘\302’ in program
main.cpp:9:2: erro: stray ‘\240’ in program
In file included from main.cpp:2:0:
myCalc.h:6:40: erro: ‘Ui’ has not been declared
myCalc.h:6:44: erro: expected ‘{’ before ‘qtCalc’
myCalc.h:7:1: erro: invalid type in declaration before ‘{’ token
myCalc.h:7:1: aviso: extended initializer lists only available with -std=c++0x or -std=gnu++0x [habilitado por padrão]
myCalc.h:8:3: erro: expected primary-expression before ‘public’
myCalc.h:8:3: erro: expected ‘}’ before ‘public’
myCalc.h:8:3: erro: expected ‘,’ or ‘;’ before ‘public’
myCalc.h:8:3: erro: uninitialized const ‘staticMetaObject’ [-fpermissive]
/usr/include/qt4/QtCore/qobjectdefs.h:304:22: nota: ‘const struct QMetaObject’ has no user-provided default constructor
/usr/include/qt4/QtCore/qobjectdefs.h:469:28: nota: and the implicitly-defined constructor does not initialize ‘const QMetaObject* QMetaObject::<anônimo struct>::superdata’
myCalc.h:8:3: erro: ‘virtual’ outside class declaration
myCalc.h:8:3: erro: non-member function ‘const QMetaObject* metaObject()’ cannot have cv-qualifier
myCalc.h:8:3: erro: ‘virtual’ outside class declaration
myCalc.h:8:3: erro: ‘virtual’ outside class declaration
myCalc.h:8:3: erro: expected unqualified-id before ‘private’
myCalc.h:8:3: aviso: ‘visibility’ attribute ignored [-Wattributes]
myCalc.h:9:3: erro: expected unqualified-id before ‘public’
myCalc.h:12:3: erro: expected unqualified-id before ‘public’
myCalc.h:17:3: erro: expected unqualified-id before ‘private’
myCalc.h:21:1: erro: expected declaration before ‘}’ token
myCalc.h:8:3: aviso: ‘void qt_static_metacall(QObject*, QMetaObject::Call, int, void**)’ declared ‘static’ but never defined [-Wunused-function]
make: ** [main.o] Erro 1
armando@odin-lap:~/projects/qt/calc$ ls^C
armando@odin-lap:~/projects/qt/calc$ ^C
armando@odin-lap:~/projects/qt/calc$

-----------------------------------------------------------------------------------------------

here is the code of the "main.cpp; myCalc.cpp; myCalc.h" files, I put the three files in a single pastebin submission:
http://pastebin.com/hZqM5xnz

and this is the myCalc.ui - generated by QT4 designer
http://pastebin.com/dBL7p9Br

the ".cpp" and the ".h" file Im created it in "gedit"!

thank's!

peace!

[amleto]

for starters you need ';' after class.

class abc
{
};

class abc
{
};

To copy to clipboard, switch view to plain text mode 

as for the errors, they are pretty simple obvious, aren't they? You have some non valid chars in your code files. Remove them!

You also reference Ui::qtCalc, but have not included any information about it.


Oh yeah, learn how to use pointers.

ptr>method();

ptr>method();

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This is NOT correct!

[marquessbr]

hi my friend, thanks, well, I cant see this inválid chars, mabe it is the " ' " or the " " " chars?
and about UI::qtCalc? where and how it need to be refered?

thank's!!

[amleto]

re-type the lines with any char problems. use a plain text editor.

and about UI::qtCalc? where and how it need to be refered?

use #include

[marquessbr]

ok, amlto, thank you!

Im redited my sources and now is ok, but returned this error, as the output of the terminal:

-------------------------------------------------------------------------------------------------
armando@odin-lap:~/projects/qt/calc$ make
g++ -c -m64 -pipe -O2 -Wall -W -D_REENTRANT -DQT_WEBKIT -DQT_NO_DEBUG -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED -I/usr/share/qt4/mkspecs/linux-g++-64 -I. -I/usr/include/qt4/QtCore -I/usr/include/qt4/QtGui -I/usr/include/qt4 -I. -I. -I. -o main.o main.cpp
main.cpp:2:20: erro fatal: qtCalc.h: Arquivo ou diretório não encontrado
compilação terminada.
make: ** [main.o] Erro 1
armando@odin-lap:~/projects/qt/calc$
-------------------------------------------------------------------------------------------------

but why? if I had refered to qtCalc.h in the main.cpp file here is the code:

#include <QApplication>
#include "qtCalc.h"

int*main(int*argc,*char *argv[])
{
QApplication*app(argc,*argv);
Calc**dialog*=*new*Calc();
dialog*>show();
return*app.exec();
}

I need help

peace!

[amleto]

what is up with your code pasting??

did you actually try and compile this?

#include <QApplication>
 #include "qtCalc.h"
 
 int*main(int*argc,*char *argv[])
 {
 QApplication*app(argc,*argv);
 Calc**dialog*=*new*Calc();
 dialog*>show();
 return*app.exec();
 }

#include <QApplication>
 #include "qtCalc.h"

 int*main(int*argc,*char *argv[])
 {
 QApplication*app(argc,*argv);
 Calc**dialog*=*new*Calc();
 dialog*>show();
 return*app.exec();
 }

To copy to clipboard, switch view to plain text mode 

what's with all of the '*'??


qtCalc.h: Arquivo ou diretório não encontrado - pretty obvious, nes pas? (yes, I know different language)

[marquessbr]

Hi, amleto!

I tried other examples and they worked very well with that given to know a little more about how the compiler and also a little on the QT interface.

So thanks for all at now!

I say this because, like I said, I program in other languages, (pascal, python, php, json) and had litle contact with C/C++/QT, but I need to maintain this post unclosed, because the real reason for this post is because I had a idea to a project with will be more complex than its examples, for developer this project I will need to use one database and the sqlite/salite3 is perfect for me, because its amalgamation whose source is write in C.

so, at the right time I'll have to go deeper into the matter and if I have a question I ask for help here in the forum!

thank's

peace!