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Something about pointer in CCS C

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PCM programmer

Joined: 06 Sep 2003
Posts: 21708

Posted: Thu Nov 19, 2009 2:40 pm

To Kamputty:

Quote:

#include <stdio.h>

int main (int argc, char *argv[])
{
char comm[][50]={"How are you?","I am fine.","Thank you!","You are welcome!"};
char *p;
int x;

Your code doesn't compile in CCS (PCH vs. 4.099). Also, CCS doesn't
support argc or argv. You can't "return" from main(). There is no O/S
to return to.

-------------------------------------------------------
To cchappyboy:

Here is an example of how to get a pointer to individual elements
in a two dimensional text array. The program below has the
following output:

Quote:

Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Last Test: Wednesday

Code:

#include <18F452.h>
#fuses XT,NOWDT,PUT,BROWNOUT,NOLVP
#use delay(clock=4000000)
#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7, ERRORS)

char weekday_names[7][10] =
{
{"Sunday"},
{"Monday"},
{"Tuesday"},
{"Wednesday"},
{"Thursday"},
{"Friday"},
{"Saturday"}
};

void display_text(char *ptr)
{
printf("%s \r", ptr);
}

//======================================
void main ()
{
int8 i;
char *p;

// Pass a pointer to each array element.
// Display all of them.
for(i=0; i < 7; i++)
{
display_text(weekday_names[i]);
}

// Get a pointer to one element in the array.
// Display it.
i = 3;
p = weekday_names[i];
printf("Last Test: %s", p);

while(1);
}

This was tested with PCH vs. 4.099.

cchappyboy

Joined: 03 Dec 2008
Posts: 45

Posted: Thu Nov 19, 2009 4:59 pm

Thanks for you guys' help.
My ccs version is 4.066
This time I try this:

Code:

char comm[4][20]={"How are you?","I am fine.","Thank you!","You are welcome!"};

char *p;

p=comm[0];

printf("%s", p);

Pass the build procedure but it don't work.
But works at

Code:

printf("%s",comm[0]);

What is the problem? Thanks.

PCM programmer

Joined: 06 Sep 2003
Posts: 21708


Posted: Thu Nov 19, 2009 5:49 pm

Post your PIC. Always do this.

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