Giusto, scusami.. ecco gli errori che mi da!

make: *** [Funzioni.o] Errore 1
gianluca@gianluca-VirtualBox:~/Scrivania/codifica-rsa/Sorgenti$ make
g++ -Wall `pkg-config --cflags --libs gtk+-3.0` -rdynamic -c -o Funzioni.o Funzioni.cc
Funzioni.cc: In function ‘void Decodifica(int, long long int)’:
Funzioni.cc:213:48: error: invalid conversion from ‘const char*’ to ‘std::basic_istream<char>::char_type* {aka char*}’ [-fpermissive]
In file included from /usr/include/c++/4.7/iostream:41:0,
from Funzioni.cc:1:
/usr/include/c++/4.7/istream:484:7: error: initializing argument 1 of ‘std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::read(std::basic_istream<_CharT, _Traits>::char_type*, std::streamsize) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::char_type = char; std::streamsize = int]’ [-fpermissive]
Funzioni.cc:219:31: error: request for member ‘c_str’ in ‘Corrente’, which is of non-class type ‘long long int’