UTF8

#include <iostream>
#include <string>
#include <fstream>
#include <sstream>

using namespace std;

string hex_to_blin(string hex_in, int& bcount)
{
	string blin = "";
	for (int i = 0; i < hex_in.length(); i++)
	{
		if (hex_in[i] == '0') blin += "0000";
		if (hex_in[i] == '1') blin += "0001";
		if (hex_in[i] == '2') blin += "0010";
		if (hex_in[i] == '3') blin += "0011";
		if (hex_in[i] == '4') blin += "0100";
		if (hex_in[i] == '5') blin += "0101";
		if (hex_in[i] == '6') blin += "0110";
		if (hex_in[i] == '7') blin += "0111";
		if (hex_in[i] == '8') blin += "1000";
		if (hex_in[i] == '9') blin += "1001";
		if (hex_in[i] == 'A') blin += "1010";
		if (hex_in[i] == 'B') blin += "1011";
		if (hex_in[i] == 'C') blin += "1100";
		if (hex_in[i] == 'D') blin += "1101";
		if (hex_in[i] == 'E') blin += "1110";
		if (hex_in[i] == 'F') blin += "1111";
		bcount++;
	}
	return blin;
}

string blin_to_hex(string blin_in)
{
	string hex = "";
	for (int i = 0; i < blin_in.length() / 4; i++)
	{
		string sub = blin_in.substr(i * 4, 4);
		if (sub == "0000") hex += "0";
		if (sub == "0001") hex += "1";
		if (sub == "0010") hex += "2";
		if (sub == "0011") hex += "3";
		if (sub == "0100") hex += "4";
		if (sub == "0101") hex += "5";
		if (sub == "0110") hex += "6";
		if (sub == "0111") hex += "7";
		if (sub == "1000") hex += "8";
		if (sub == "1001") hex += "9";
		if (sub == "1010") hex += "A";
		if (sub == "1011") hex += "B";
		if (sub == "1100") hex += "C";
		if (sub == "1101") hex += "D";
		if (sub == "1110") hex += "E";
		if (sub == "1111") hex += "F";
	}
	return hex;
}

string blin_to_UTF8(string blin, int bcount)
{
	string UTF8;
	if (bcount == 2)
	{
		UTF8 = blin;
		UTF8[0] = '0';
	}
	if (bcount == 4)
	{
		UTF8 = blin;
		UTF8[0] = '1'; UTF8[8] = '1';
		UTF8[1] = '1'; UTF8[9] = '0';
		UTF8[2] = '0';
	}
	if (bcount == 6)
	{
		UTF8 = blin;
		UTF8[0] = '1'; UTF8[8] = '1'; UTF8[16] = '1';
		UTF8[1] = '1'; UTF8[9] = '0'; UTF8[17] = '0';
		UTF8[2] = '1';
		UTF8[3] = '0';
	}
	if (bcount == 8)
	{
		UTF8 = blin;
		UTF8[0] = '1'; UTF8[8] = '1'; UTF8[16] = '1'; UTF8[24] = '1';
		UTF8[1] = '1'; UTF8[9] = '0'; UTF8[17] = '0'; UTF8[25] = '1';
		UTF8[2] = '1';
		UTF8[3] = '1';
		UTF8[4] = '0';
	}
	return UTF8;
}

int main()
{
	char c; cin >> c;
	int char_int = c;
	stringstream ss;
	ss << std::hex << char_int;
	string char_hex = ss.str();
	cout << "hex: " << char_hex << endl;
	int bytecount = 0;
	string char_blin = hex_to_blin(char_hex,bytecount);
	cout << "bin: " << char_blin << ", hex char count: " << bytecount << endl;
	string UTF8_blin = blin_to_UTF8(char_blin, bytecount);
	cout << "UTF8 - bin: " << UTF8_blin;
	string UTF8_hex = blin_to_hex(UTF8_blin);
	cout << ", hex: " << UTF8_hex << endl;
	return 0;
}