#include <stdio.h>

int numcmp(const char *s1, const char *s2)
{
	const char *p1 = s1;
	const char *p2 = s2;

	// go past leading zeros
	while (*p1 == '0') p1++;
	while (*p2 == '0') p2++;
	
	// count the characters in the leading integer portions of the strings
	const char *decimal1 = p1;
	const char *decimal2 = p2;

	while (*decimal1 != 0 && *decimal1 != '.') decimal1++;
	while (*decimal2 != 0 && *decimal2 != '.') decimal2++;

	size_t count1 = decimal1 - p1;
	size_t count2 = decimal2 - p2;

	// longer integers are bigger
	if (count1 < count2) return -1;
	if (count1 > count2) return 1;

	// There are the same number of digits in the integer portions of the string
	// so now compare all the characters in the integer string individually
	while (p1 != decimal1) {
		// NOTE: its unnecessary to test p2 != decimal2, since char counts are equal

		char c1 = *p1++;
		char c2 = *p2++;		

		if (c1 < c2 ) return -1;
		if (c1 > c2) return 1;
	}

	// advance pointers past decimal point
	if (*p1 == '.') p1++;
	if (*p2 == '.') p2++;

	// now compare the fractional portion of the string
	// do this until the characters differ or a string ends
	while (*p1 != 0 && *p2 != 0) {
		char c1 = *p1++;
		char c2 = *p2++;

		if (c1 < c2 ) return -1;		
		if (c1 > c2) return 1;
	}

	// skip past any zero characters that remain in the strings
	// (at least one string is at the null now, but we
	// need not explicitly test)
	while (*p1 == '0') p1++;
	while (*p2 == '0') p2++;

	// compare the final characters (one string may still have more characters
	// but it doesn't matter). The only possible characters are NULL
	// and '1' through '9' ('0' is not possible, we explicitly skipped them).
	// The NULL character will act as a '0' however for comparison purposes
	if (*p1 < *p2 ) return -1;		
	if (*p1 > *p2) return 1;

	return 0;
}

void check( int expect, const char *s1, const char *s2 )
{
    int res;
    res = numcmp(s1, s2);
    if( res > 1 )
        res = 1;
    else if( res < -1 )
        res = -1;
    if( res != expect )
        printf(" whoops! %s , %s = %d\n", s1, s2, res);
}


int main(int argc, char* argv[])
{
	
 
    check( 1,"321", "54" );
    check(-1,"54", "321" );
    check( 1,"321.6", "00054" );
    check(-1,"54", "000321.6" );
    check( 1,"321.6", "54.7" );
    check(-1,"54.000", "321.0" );
    check( 1,"321.6", "54.00000" );
    check(-1,"54.00000", "00000321.6" );
    check( 0,"0", "0000000.000000000000");
    check( 0,"123.", "123.00000000");
    check( 0,"123.000", "123");
    check( 1,"123.001", "123");
    check(-1,"123", "123.001");
    check( 0,"123", "123.");
    check( 1,"123", ".123");
    check(-1,"00000100000.0001", "00000100000.0002");
    check(-1,"1234567890.", "1234567891.");
    check(-1,".1234567890", ".1234567891");
    check( 1,"12345.0001", "0001234.0001");
    check( 1,"0512345.0001", "0412345.0001");
    check(-1,"0512345.0001", "0612345.0001");
    return 0;
}