hex_to_dec.cpp

#include <iostream>
#include <cstring>
#include <cmath>
/* This function converts char array (little endian) to integer
 * For example: {0xCA, 0xFE, 0xBA, 0xBE} -> 0xBEBAFECA -> 3199925962
 * I'm a bad programmer, so here is workaround: 
 * You need to specify length of char array by second function argument
 * Kill me :(
 */
int hex_to_dec (const unsigned char input[], const unsigned int count)
{
	unsigned int sum;
	for (int i = count; i >= 0; i--)
	{
		unsigned int tmp = (int) input[i] * (int) pow (16, i * 2);
		sum += tmp;
	}
	return sum;
}
int main()
{
	const unsigned char address[4] = {0x00, 0xF8, 0x1E, 0x12};
	printf("%u\n", hex_to_dec(address, 4));
	return 0;
}