Why an C program .exe cannot get output

[hednast]

Hello. I have a problem. When I compile in a turbo C compiler I can get the result that I want. But after I compile that project file into an exe and then run that exe, I don't get the results I want anymore. Why is there a difference between the project file and the compiled exe.

Please asists. Thank you.

 

[echo47]

That's not much information to go on.

I would guess that your project file has configuration settings that are different from Turbo C's default project settings.

 

[jimjim2k]

Hi

C has two outputs: stdout and stderr

void fprintf(stdout, "...", ...);
void fprintf(stderr, "...", ...);

in most systems stdout is obviously stderr but in some prohramming styles these tow may differ.

you may check it in linux(unix systems) with something like 2>&1 , ...
you may check it in windows with something like
myprog.exe [myparameter ....] > results.txt

please redo these check and approaches and let us know the status.


tnx

 

[hednast]

Hai.....sorry i am a little confuse with the replies given.........The source code is as below.........



#include <stdio.h>
#include <dos.h>

int main()
{
int i;
unsigned char far* scrn = (unsigned char far*) 0xb0008000;
FILE *fp = fopen("c:\\text.txt","w");

for(i=0;i<6900;i+=2)
fputc(*(scrn+i),fp);

fclose(fp);

return 0;
}

When I press Alt+F9, I get the text.txt with the information on the dos screen. Now I have tested. If I open the dos prompt and straight away type the exe Eg: C:\Scrncap.exe, I won't get the output in the c:\text.txt. The file exist but contains nothing inside. But if I open the turbo C compiler, then close it back again. And then type the exe Eg: C:\scrncap.exe, I get the output of the dos screen in the c:\text.txt. This is the part I really don't understand. Why in a newly open dos prompt I cannot capture the text in the c:\text.txt?

Added after 2 hours 50 minutes:

Hai. Thanks for the helps I receive. I found out my problem. My pc is using Win2K. Therefore I can get the result when I do the compilation in Turbo C compiler. But on the plain dos prompt I cannot get the result. I tested on a Win98 machine and it worked well. Extreme good. Therefore I would conclude that the ancient compiler is not compatible with Win2K onwards.

Problem Solved.

 

[hock]

Turbo C can not bypass HAL(hardware Abstrection Layer) used in PC.
you will have to use a windows 2000 compitible compiler and use MFC.
no in out instruction can be used in NT environment.
hock