Help: need to prevent infinite loop

[Shriramana Sharma <samjnaa@gmail.com>]

Hello. I have the following code:

#include "stdio.h"
int repeatinput;
int jday, jmon, jyear;
enum boolean { FALSE, TRUE };
void main(void)
{
	do
	{
		repeatinput = FALSE;
		printf("Date as YYYY-MM-DD     : ");
		if (scanf("%d-%d-%d", &jyear, &jmon, &jday) < 1) repeatinput = TRUE;
		if (jyear < 1800 || jyear > 2399) repeatinput = TRUE;
		if (repeatinput) printf ("Please enter a valid date.\n");
	}
	while (repeatinput);
	printf ("Thanks for entering a valid date.\n");
}

If I compile it with gcc and execute it, and press an arrow key at the input 
prompt and press enter, I get an infinite loop giving the date prompt and 
saying "Please enter a valid date".

Wonder what's wrong with the code? Should not, at the second execution of the 
loop, it wait for me to enter a correct input?

Thanks for your feedback.

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