#include <stdio.h>
#include <ctype.h>
#include "getch.h"

#define NUMBER '\007'

int getop(char s[]) {
    int i, c;

    while ((s[0] = c = getch()) == ' ' || c == '\t');

    s[1] = '\0';
    if (!isdigit(c) && c != '.')
	return c;
    
    i = 0;
    if (isdigit(c))
	while (isdigit(s[++i] = c = getch()));
    if (c == '.')
	while (isdigit(s[++i] = c = getch()));
    s[i] = '\0';
    if (c != EOF)
	ungetch(c);
    return NUMBER;
}

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