Chipher Vigenere

vigenere.cpp

int main()
{
	std::string str = "ATTACKATDAWN";
	std::string key = "LEMONLEMONLE";

	std::string result;

	int keyIndex = 0;

	char s_buffer[100];
	int i = 0;
	for (i = 0; i < str.length(); i++)
	{
		char chiphed = Vigenere(str[i], key[i]);
		(keyIndex == key.length() - 1) ? keyIndex = 0 : keyIndex++;
		s_buffer[i] = chiphed;
	}

	s_buffer[i] = 0;

	std::cout << s_buffer << std::endl;
}