/*
 * Simple program to copy from standard input to standard output
 * character by character.  Can use with I/O redirection to copy
 * files, e.g.,
 *   a.out < in.txt > out.txt
 */
#include <stdio.h>

int main(void) {
	int inchar;
	while ((inchar = getchar()) != EOF) {
		putchar(inchar);
	}
	return 0;
}