Help needed to count lines between preprocessor directives

[James Kew]

char tstr[10]; [...]
cfile=fopen(filepath, "r");
fseek(cfile,SEEK_SET);//not sure if this is correctly formulated

Or indeed even needed -- why seek to the beginning a file you've just
opened?

for(;strcmp(tstr,"#ifdef win32")!=0;fgets(cfile,tstr));//value for strcmp

tstr is undefined for the first iteration here.

James

 

[MikeyD]

char tstr[10];

[...]

cfile=fopen(filepath, "r");
fseek(cfile,SEEK_SET);//not sure if this is correctly formulated

Or indeed even needed -- why seek to the beginning a file you've just
opened?

To make sure the cursor is at the start. I don't know if it's necessary or
not.

strcmp

tstr is undefined for the first iteration here.

Okay then, replace char tstr[10]; with char tstr[]="aaaaaaaaaaa";

 

[Barry Schwarz]

char tstr[10]; [...]
cfile=fopen(filepath, "r");
fseek(cfile,SEEK_SET);//not sure if this is correctly formulated

Or indeed even needed -- why seek to the beginning a file you've just
opened?

To make sure the cursor is at the start. I don't know if it's necessary or
not.

What cursor?

What does you manual say that fopen will do if it successfully opens a
file for read?



<<Remove the del for email>>

 

[MikeyD]

char tstr[10];
[...]
cfile=fopen(filepath, "r");
fseek(cfile,SEEK_SET);//not sure if this is correctly formulated

Or indeed even needed -- why seek to the beginning a file you've just
opened?

To make sure the cursor is at the start. I don't know if it's necessary or
not.

What cursor?

The file cursor

What does you manual say that fopen will do if it successfully opens a
file for read?

It says it will return a pointer to that file. Then it moves on to fclose().

 

[Mark McIntyre]

The file cursor

its called the file position indicator in the C standard. "cursor" is
a term more often associated with databases or screens.

It says it will return a pointer to that file.

It doesn't mention the effect of the 2nd parameter to fopen()? If it
came with your compiler, complain to the vendor, otherwise throw it
away and get a proper manual. For any decent manual will tell you
about that parameter and thus explain where the position indicator is
set to when you open the file.

 

[MikeyD]

What does you manual say that fopen will do if it successfully opens a

It doesn't mention the effect of the 2nd parameter to fopen()? If it
came with your compiler, complain to the vendor, otherwise throw it
away and get a proper manual. For any decent manual will tell you
about that parameter and thus explain where the position indicator is
set to when you open the file.

What I can remember of my manual entry. I may have just forgotten about the
file position indicator.
"...fopen([const?]char* filename, const char* mode)
Opens the file <i>filename</i> in the mode indicated by <i>mode</i>. Mode
list:
<table>
r Opens the file for reading
w Opens the file for writing
.....
</table>
<b>Returns:</b> A pointer to that file.
fclose(FILE* f)..."