float numbers slightly out

/* getfloat5-2.c: make floating point number array out of numbers found in freeform input.
(not quite working but nearly - odd small decimal inaccuracies on the end
sometimes for some reason.) */

#include <stdio.h>
#include "getch.c"
#define SIZE 100

main()
{
	int i, n, x, getfloat(float *);
	float array[SIZE];
	
	for(n=0; n < SIZE && (i=getfloat(&array[n])) != EOF; n++)
		if(i==0)	/* not a number - try to fill same array element again */
			n--;
	
	printf("# of #'s: %d\n", n);
	
	for(x=0; x < n; x++)		/* print the results */
		printf("%f\n",array[x]);
}

/* getfloat: get next float from input into *pn */
int getfloat(float *pn)
{
	int c, sign;
	float fraction;
	
	while(isspace(c=getch()))	/* skip white space */
		;
	if(!isdigit(c) && c != EOF && c != '+' && c != '-' && c != '.')
		return 0;		/* it's not a number */
	sign=(c=='-') ? -1 : 1;		/* record pos or neg */
	if(c=='+' || c=='-') {
		c=getch();
		if(!isdigit(c) && c != EOF)
			return 0;
	}
	for(*pn=0.0; isdigit(c); c=getch())	/* get integer part of number */
		*pn=10 * *pn + (c-'0');
	
	fraction = 1.0;
	if(c=='.') {		/* there's possibly a fraction part to come */
		while(isdigit(c=getch())) {
			*pn = 10.0 * *pn + (c - '0');
			fraction *= 10.0;
		}
	}
	*pn = sign * *pn / fraction; 
	if(c != EOF)
		ungetch(c);
	return c;
}