Compilare: main.cpp: In function 'void stringMap(std::__cxx11::string&, std::__cxx11::string&)': main.cpp:11:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<s.size(); i++){ ~^~~~~~~~~ main.cpp:12:19: warning: array subscript has type 'char' [-Wchar-subscripts] if (c[s[i]] == 0) ^ main.cpp:13:19: warning: array subscript has type 'char' [-Wchar-subscripts] c[s[i]] = chr++; ^ main.cpp:14:31: warning: array subscript has type 'char' [-Wchar-subscripts] hash.push_back (c[s[i]]); ^ main.cpp: In function 'int main()': main.cpp:22:15: warning: unused variable 'value' [-Wunused-variable] int n, i, value, k, j; ^~~~~ main.cpp:22:22: warning: unused variable 'k' [-Wunused-variable] int n, i, value, k, j; ^ main.cpp:22:25: warning: unused variable 'j' [-Wunused-variable] int n, i, value, k, j; ^