putchar and putc are not working ....

purpleburple · 07-03-2002, 06:15 PM

Hi. I'm using Redhat 7.2 and emacs that came with it. Learning C. I did the following little program from a C book.

#include <stdio.h>

int main(void)
{

putchar(65);

return 0;
}

my output after compiling and running is just blank after the program runs.
It's the same with the following

#include <stdio.h>

int main(void)
{

int ch;
ch = 65;

printf("The character that has the numerical value of 65 is:\n");

putc(ch, stdout);
return 0;
}

i compile putc.c with > gcc -o putc putc.c

then I run it at bash prompt with ./putc
and I get a blank line as output

crabboy · 07-03-2002, 09:34 PM

Do you see the output from the printf?

Try assigning the return value from putc and either print it out with printf, if it works, or test it in an if condition against EOF.

Code:

   iReturnCode = putc( ch, stdio );
   if ( iReturnCode == EOF )
      exit ( -1 );
   else
      exit ( 1 );

purpleburple · 07-04-2002, 10:28 AM

yes I do see the output from printf but then it's blank after that on the standard output

purpleburple · 07-04-2002, 10:30 AM

On the program with just the putchar() function I see absolutely nothing on standard output

Mara · 07-04-2002, 03:28 PM

You should send '\n' to the output after your character.