Pointer as key for C++ map

map_example.cc

#include <iostream>
#include <map>

// Compile: g++ map_example.cc
// Run: ./a.out

int main(void)
{
	std::map<unsigned char*, int> paleta;
	unsigned char rgb1[3], rgb2[3];

	rgb1[0] = 100;
	rgb1[1] = 200;
	rgb1[2] = 0;

	rgb2[0] = 0;
	rgb2[1] = 0;
	rgb2[2] = 255;

	paleta[rgb1] = 100;
	paleta[rgb2] = 55;

	std::cout << paleta[rgb1] << ", " << paleta[rgb2] << std::endl;

	for( std::map<unsigned char*, int>::iterator ii=paleta.begin(); ii!=paleta.end(); ++ii)
	{
		std::cout << "(" << (int)(*ii).first[0] << ", "
			<< (int)(*ii).first[1] << ", "
			<< (int)(*ii).first[2] << "): " << (*ii).second << std::endl;
	}

	return 1;
}