Compilare: main.cpp: In function 'std::__cxx11::string encript(std::__cxx11::string)': main.cpp:17:6: warning: array subscript has type 'char' [-Wchar-subscripts] p[c] = 0; ^ main.cpp:21:9: warning: array subscript has type 'char' [-Wchar-subscripts] if(p[i] == 0) ^ main.cpp:22:7: warning: array subscript has type 'char' [-Wchar-subscripts] p[i] = ++k; ^ main.cpp:24:10: warning: array subscript has type 'char' [-Wchar-subscripts] i = p[i]; ^ main.cpp: In function 'int main()': main.cpp:43:6: warning: unused variable 'nr' [-Wunused-variable] int nr = 0; ^~