#include <stdio.h>
#include <stdlib.h>

char  *ReverseStr(char dest[])
{
	int  i = 0, num = 0;
	while(dest[num])
		++num;
	--num;
	while(i < num)
	{
		char  tmp = dest[i];
		dest[i] = dest[num];
		dest[num] = tmp;
		++i;
		--num;
	}
	return dest;
}

char  *DecToBin(char dest[], int num)
{
	int  i = 0;
	if(num < 0)
	{
		dest[0] = '-';
		DecToBin(&dest[1], -num);
		return dest;
	}
	do
	{
		dest[i] = num % 2 + '0';
		num /= 2;
		++i;
	}	while(num > 0);
	dest[i] = '\0';
	return ReverseStr(dest);
}

int main(int argc, char *argv[])
{
	char  buf[256];
	int   i, num;
	for(i = 1; i < argc; ++i)
	{
		int  num = atoi(argv[i]);
		printf("%d = %s\n", num, DecToBin(buf, num));
	}
	getchar();
	return 0;
}