Noob question about putchar and getchar

zombi3 · 12-20-2003, 03:18 PM

I was wondering why do i have to declare c=getchar() within the while loop?

Quote:

#include <stdio.h>
main()
{
int c;
c=getchar(); /*declare c to getchar() for character inputs*/
while(c != EOF){
putchar(c);
c=getchar();
}
}

Mara · 12-20-2003, 04:32 PM

The program works this way:
First, c=getchar() gets first character. Then the loop starts (checks if the char is EOF). In the loop, the char is printed and then next one is read. Then the loop ends and the expression in 'while' is calculated again. If the char is EOF, the loop ends, if it isn't - it continues (printed, then next char).

zombi3 · 12-20-2003, 04:38 PM

OOO okay that clears things up :P thanks alot.Thats why when i take out c=getchar() out of the loop; the loop doesn't end.