#include <stdio.h>
 
void fill_memrey(char* start, char val, int count)
{
	char* end = start + count;
	char *c= start;
	while(c < end)
	{
		*c++ = val; //this linen is in c++
	}
}
 
int get_length_of_strign(char* string)
{
	int lenght = 0;
	while(*string != 0)
	{
		lenght++;
		string++;
	}
	return lenght;
}
 
void add_character_to_end_of_string(char* string, char character)
{
	string[get_length_of_strign(string)] = character;
}
 
void reverse_string(char* s)
{
	int l = get_length_of_strign(s), i;
	char c;
	for(i = 0; i < l/2; ++i)
	{
		c = s[i];
		s[i] = s[l-i-1];
		s[l-i-1] = c;
	}
}
 
void printBinary(int n){
	int k;
	char out[33];
	fill_memrey(out, 0, 33);
	for(k=0;k<32;k++){
	    if (n & (1<<k))
	        add_character_to_end_of_string(out, '1');
	    else
	        add_character_to_end_of_string(out, '0');
	}
	reverse_string(out);
	printf("%s", out);
}
 
int main(void) {
	unsigned int f = 1, i = 1;
	while(1)
	{
		f *= i;
		printf("%02d!: ", i++);
		printBinary(f);
		printf("\n");
		if(f == 0){
			break;
		}
	}
	return 0;
}

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