What is the different in these C language?

p24fj128ga010.h

I am doing some project using PIC MCU.

But, i find that some discepencies between two program at below.

Program 1:
---------------------------------------------------
#include "p24fj128ga010.h"

int counter;
int main(void)


{counter=1;
TRISA=0;
while(1)
{
PORTA=counter;
counter++;
}


return 0;
}
------------------------------------------------

Program 2:
-------------------------------------------------
#include <16F873.h>
#use delay (clock=4000000)

void main ()
{
char i,j,k;
i=2;
j=3;
k=i+j;
}

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

why in program 1 #include continue with "xxxxx.h" and the program 2 is continue with <xxxx.h>. aren't the same?

is both c language right?

they use diffrent compiler?

in program1, the port A is set as output and all output is high. How can we make some of the output of portA is low?

p24fj128ga010

lcs81 said:

I am doing some project using PIC MCU.

why in program 1 #include continue with "xxxxx.h" and the program 2 is continue with <xxxx.h>. aren't the same?

Click to expand...

Yes they are same, generally <xxxx.h> format is used for standard header files provided by the compiler and standard libraries such as stdio.h, stdlib.h. while "xxxx.h" is used for user's header files.

lcs81 said:

is both c language right?

Click to expand...

Yes in most of the cases you can use any format.

lcs81 said:

they use diffrent compiler?

Click to expand...

Not necessary, any c compiler will accept both formats.

#include <16f873.h>

in c, only can use hexa and decimal as number? Binary cannot be use?

deffirent terms of c language

In general, the

#include <xxx.h>, the C compiler will search the header file in the standard directory i.e, C:\Program Files\SDCC\include if you use SDCC as C compiler. But for

#include "xxx.h" , the C compiler will search the header file in the local directory which is the same direct as xxx.c file or path specific.

In this case

#include <16F873.h> mean that 16F873.h is a standard header file.
#include "p24fj128ga010.h" mean that p24fj128ga010.h may be written by someone else with own work.

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