#include <iostream>
#include <string>
#include <cctype>
#include <cstring>
#include <cstdio>
using namespace std;

auto zum(string verschalp,  int wahl, string dat) -> string
{
	string rA = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
	string cA = verschalp;
	int choice;
	choice = wahl;
	string s;
	s = dat;
	int max = s.size();
	if (choice == 1)
	{
		for (int i = 0; i < max; i++)
		{
			for (int z = 0; z < 26; ++z)
			{
				if (s[i] == rA[z])
				{
					dat[i] = cA[z];
				}
			}
		}
	}
	else
		if (choice == 2)
		{
			for (int i = 0; i < max; ++i)
			{
				for (int z = 0; z < 26; ++z)
				{
					if (s[i] == cA[z])
						dat[i] = rA[z];
				}
			}
		}
	return dat;
}

int main()
{
	string key = "GKXCSLZUAHWDBMTYENJVPOIRFQ";
	string ver = "HALLOASTERIX";
	cout << "a)" << endl;
	cout << "Klartext : " << ver << endl << "Geheimtext : " << zum(key, 1, ver) <<endl;
	ver = "JGDOSXGSJGN";
	cout << "b)" << endl;
	cout << "Klartext : " << ver << endl << "Geheimtext : " << zum(key, 2, ver) << endl;
	string s = " ";
	cout << (int)s[0] << endl;

}