hi
ive been trying for a loooong time to get the code to work. Actually when i compiled it using VC++ i did not get any errors only a few warnings. when i'd finally run the program nothing is written to the log.txt file. What im trying to do is run "dir" using system() call and copy the output that is printed on the screen and save it to a file. but it is not working. plz help me.

-heres the code-

#include
#include
#include
main()
{
char *buff;
FILE *fp;
if((buff=malloc(sizeof(char) * 200))==NULL)
{
fprintf(stderr,"malloc failed");
exit(1);
}
fp=fopen("c:/windows/desktop/log.txt","w");
if(fp==NULL)
{
fprintf(stderr,"error opening file");
exit(1);
}
buff=system("dir");
fputs(fp,buff);
getch();
return 0;
}

Hi-
I only glanced at the c code, I'm not a c guy myself, but I am pretty sure that you should do this a different way. Rather than trying to execute dir and capture the output, you should have dir itself send the output to a file rather than the screen. Your system command should look something like:
dir>>file.txt

Or if the greater than signs didn't show up,
dir]]file.txt
(with gt signs rather than brackets)

Best of luck,
SN

On my compiler at least, system is looking for an int return value and not a pointer to a char, so I don't think that is valid C code.

you could dump the dir to a txt file and read that if you wish to use system().

system("dir > dir.txt");

Your code is unclear. Do you wish to read the directory contents of windows\desktop or are you trying to write the contents of a dir listing to log.txt?

fopen("c:\\windows\\desktop\\log.txt", "mode");