Silly problem

[samolet4e]

Help me please with the following code:

if ((str = fopen("init1.txt", "r")) == NULL) {
fprintf(stderr, "Cannot open init file 1\n"); getc(stdin);
return 1;
}//if

The code actually is correct. However, when I am debuging the above I get the following messages

- str 0x67161448 {_ptr=0x00000000 <Bad Ptr> _cnt=0 _base=0x00000000 <Bad Ptr> ...} _iobuf *
+ _ptr 0x00000000 <Bad Ptr> char *
CXX0030: Error: expression cannot be evaluated
_cnt 0 int
- _base 0x00000000 <Bad Ptr> char *
CXX0030: Error: expression cannot be evaluated
_flag 1 int
_file 3 int
_charbuf 0 int
_bufsiz 0 int
- _tmpfname 0x00000000 <Bad Ptr> char *
CXX0030: Error: expression cannot be evaluated

I can't figure out what the problem is. The code works but I'd rather not read such a message.
I use MSVS 2008.
Thank you in advance!

[MK27]

How is "str" declared?

[samolet4e]

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

integer main(void) {
double a;
FILE *str;

if ((str = fopen("init1.txt", "r")) == NULL) {
fprintf(stderr, "Cannot open init file 1\n"); getc(stdin);
return 1;
}//if
fseek(str, 0, SEEK_SET);

fscanf(str, "%d\n", &a);

fclose(str);

}//main

[laserlight]

Please post your code in [code][/code] bbcode tags.

Are you sure that you posted the code that you actually compiled? MSVC8 reports the errors:

(4) : error C2146: syntax error : missing ';' before identifier 'main'
(4) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
(4) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int

These are about your use of integer instead of int.

[samolet4e]

I am sorry, it was my fault. The program is a small part of the largest project. The following works as a console Win32 application from existing code.

typedef int integer;

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

integer main(void) {
double a;
FILE *str;//place the breakpoint here

if ((str = fopen("init1.txt", "r")) == NULL) {
fprintf(stderr, "Cannot open init file 1\n"); getc(stdin);
return 1;
}//if
fseek(str, 0, SEEK_SET);

fscanf(str, "%lf\n", &a);

fclose(str);

return 0;

}//main

The debugger replies as follows:

- str 0x6a7c1448 {_ptr=0x00000000 <Bad Ptr> _cnt=0 _base=0x00000000 <Bad Ptr> ...} _iobuf *
+ _ptr 0x00000000 <Bad Ptr> char *
CXX0030: Error: expression cannot be evaluated
_cnt 0 int
+ _base 0x00000000 <Bad Ptr> char *
CXX0030: Error: expression cannot be evaluated
_flag 1 int
_file 3 int
_charbuf 0 int
_bufsiz 0 int
- _tmpfname 0x00000000 <Bad Ptr> char *
CXX0030: Error: expression cannot be evaluated

Once again thank you for the prompt response.

[laserlight]

Oh, I think I understand: you can ignore those messages. If I read them correctly, they are just telling you that additional information that might otherwise be provided cannot be provided since the pointer is a null pointer.