c program: how can it be identified when the control reaches eof .

batman4 · 02-03-2013, 12:27 PM

this is the code

Code:

#include<stdio.h>
main(){
int c,count=0;
if((c=getchar())=!EOF)
printf("process");

printf("end");

}

In what case will it print end .
if we press ctrl+d/ ctrl+c ,it should first print "end"
Please explain me in which case my control will be in else condition.

PTrenholme · 02-03-2013, 02:36 PM

Well, your code has no loop, so you'll always fall though to the "end."
Perhaps you meant

Code:

$ cat temp.c
#include<stdio.h>
main(){
  int c,count=0;
  while ((c=getchar()) != EOF)
    printf("process c=\"%c\"\n",c);

  printf("end\n");

}
$ echo -n abcd | ./temp 
process c="a"
process c="b"
process c="c"
process c="d"
end

Note: ^C will terminate the execution of the whole program, not end the input. ^D is what you want.
Note2: The getchar function will read the '\n' at the end of each input line, hence the -n option to the echo command in the sample output, above.