/*
 * program to reverse a line of text
 */
#include <stdio.h>

void reverse(void) {
	int ch = getchar();
	if (ch != '\n') {
		reverse();
		putchar(ch);
	}
}

int main(void) {
	printf("enter a line of text\n");
	reverse();
	putchar('\n');
	return 0;
}