getchar - Read a character from standard input

Definition	#include <stdio.h> int getchar(void); getchar reads a character from the standard input (file pointer stdin).
Return val.	Character read as a positive integer value
		if successful.
	EOF	for end of file or error.
Notes	getchar is implemented both as a macro and as a function (see section “Functions and macros”). If you use a comparison such as while((c = getchar()) != EOF) in your program, the variable c must always be declared as an integer. If you define c as a char, the EOF condition is never satisfied for the following reason: -1 is converted to char ’0xFF’ (i.e. +255); EOF, however, is defined as -1. You can satisfy the EOF condition when reading from the terminal by means of the following actions: pressing the K2 key and entering the system commands EOF and RESUME-PROGRAM.
See also	getc, fgetc, getwchar