NEWBIE HELP - Why does this code produce no output???

I am trying to learn C. I want to take a small text file and if the line begins NUMBER then add the number to a rolling count, if the line begins TEXT then print the line on screen.

eg

NUMBER=10
TEXT=Hi
NUMBER=3

I would add the 10 + 3 and print the hi.

I have the following code:

#include <stdio.h>
#include <string.h>

main()

{
char word[50];
char fChar[10];
char *pntr;

/* Get pointer */
FILE *input_file_pointer;

/* Open file */
input_file_pointer = fopen("clist.cfg","r");

/* if file is not present then stop */
if (input_file_pointer == NULL)
{
printf("Fail\n");
return 0;

}
else

/*
While not at the end of file, read each line into a variable
called WORD.
*/
while (fgets(word, 50, input_file_pointer) != EOF)
{
strncpy(fChar, word, 1); /* copy first char of word to fChar */
pntr = strchr(word, '=');/* set pointer to first occurance of = within word */
pntr++; /* move point up 1 space to get rid of = */
if (fChar == 'T')
{
printf("%s", pntr);
}
else if (printf == 'N')
{
printf("numbertime");
/* printf("%s\t", fChar); /* print the fChar */
/* printf("%s", pntr); /* print the pntr */
}

}

fclose(input_file_pointer);
}

When I run it I get comparing pointer to integer warnings but that isnt the main problem, the main problem is nothing happens when I run it!

Can anyone offer a suggestion as to how I messed this up?

one thing i noticed was that your pointer arithmetic is incorrect. when you increment a pointer, pntr++ you are actually incrementing it by 4 bytes, the size of a pointer.

I'm sorry I don't see exactly what the main problem is. (I'm pretty new at C as well) You might, however, want to change these lines like this:

/*Old lines*/
if (input_file_pointer == NULL)
{
printf("Fail\n");
return 0;
}

/*New lines*/
if (input_file_pointer == NULL)
{
fprintf(stderr, "Error opening file\n"); /*printing to stderr (usually the moniter) is usually desirable in case our error has affected the stdout display (which in your case I don't think it would but its a good habit nonetheless ) */
exit (1); /*We want to exit with an error condition*/
}

Cheers guys, I re-worked it. Still dont know what is happening. The code is at the bottom, however, now I can display everything that is on lines begining with a T, but the numbers do not get added. Take a look.

#include <stdio.h>
#include <string.h>
#include <stdlib.h>


main()

{
char word[50], *pntr;
int resCmp, result, midResult;

FILE *input_file_pointer;

resCmp = result = midResult = 0;

input_file_pointer = fopen("clist.cfg","r");

if (input_file_pointer == NULL)
{
printf("Fail\n");

}
else

while (fgets(word, 50, input_file_pointer) != EOF)
{
resCmp = memcmp("T",word, 1);
pntr = strchr(word, '=');
pntr++;
if (resCmp != 0)
{
midResult = atoi(word);
result += midResult;
}
else
{
printf("%s", pntr);
}

}

fclose(input_file_pointer);
printf("%d", result);
}

Actually, in pointer arithmetic you increment by the size of the data type being pointed to, so (data type encoded into pointer names):
char_ptr++ increments by one byte
int_ptr++ increments by two bytes (assuming 2-byte ints)
double_ptr++ increments by 8 bytes
ptr_ptr++ increments by 4 bytes, the size of a pointer

That line:
else if (printf == 'N')
is the problem.

printf is the name of a function. When you use a function name with parentheses, then you are calling that function, but without the parentheses you are using the function name as a pointer to that function.

A slight oddity of C is that it treats character literals as numeric values, commonly int's (see that some library functions that expect or return a character are declared with int instead of char). So your error message was generated because you were trying to compare a pointer (printf) with an int ('N'). Personally, I don't see what you were trying to do there.

BTW, using a function pointer can be very handy at times, as in creating a jump table or a struct array in which you store the pointer to an item's handler. Not beginner stuff, but you may encounter it later.

I noticed that after I posted. I don't know what I was thinking there. I re-worked the code and u can see above. Stilll open for suggestions.

You are doing the atoi on word rather than pntr.

Ok That was dumb of me! However, if I substitute pntr for word, I get a segmentation fault.

Anyone care to tell me what one of them is???

It could be that pntr is set to NULL, which would definitely get you a segmentation fault.

You need to add error checking. If strchr does not find the character ('=' in this case), then it returns NULL.