The extended and external use .c and .h class?

Goal: Make main.c become smaller.

Problem: When the .c file is created, eror show "implicit declaration of function 'show_dialog_message' [- Wimplicit - function-declaration]" on show_dialog_message

Question: How to use class extended/external .c and .h? or something wrong in the following coding?

Mini code: all the required classes are included.

The main.c

#include "helloworld.c".

If (EXIT_FAILURE is {resize (event))}
stop = true;
}

HelloWorld.c:

int resize(bps_event_t *event) {}
If {(event)
snprintf (msg, MSG_SIZE, "Hello World!");
show_dialog_message (MSG);
}
Return EXIT_SUCCESS;
}

HelloWorld.h

int resize(bps_event_t *event);

Thank you for your attention,

Hello

In main.c include helloworld.h, .c

.c files are compiled independently.

the .h files first implemented in .c files report.

So when referencing functions implemented in other .c files, include .h file to before--declare variables and functions.

It will work in this case, but generally it is better to guard multiple of inclusion in the .h file using the preprocessor commands:

HelloWorld.h

#ifndef HELLOWORLD_H
#define HELLOWORLD_H

int resize(bps_event_t *event);

#endif // HELLOWORLD_H

Tags: BlackBerry Developers

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