Compilare: main.cpp: In function 'int main()': main.cpp:15:22: warning: array subscript has type 'char' [-Wchar-subscripts] mp[(char)s[i]] ++ ; ^ main.cpp:21:28: warning: array subscript has type 'char' [-Wchar-subscripts] if ((mp[(char)j] > 0 && j != Previous && Good == true) || (mp[(char)j] >= (len - i) / 2 + 1 && j != Previous)) { ^ main.cpp:21:82: warning: array subscript has type 'char' [-Wchar-subscripts] if ((mp[(char)j] > 0 && j != Previous && Good == true) || (mp[(char)j] >= (len - i) / 2 + 1 && j != Previous)) { ^ main.cpp:26:21: warning: array subscript has type 'char' [-Wchar-subscripts] mp[(char)Ans] -- ; ^ main.cpp:21:28: warning: iteration 23 invokes undefined behavior [-Waggressive-loop-optimizations] if ((mp[(char)j] > 0 && j != Previous && Good == true) || (mp[(char)j] >= (len - i) / 2 + 1 && j != Previous)) { ~~~~~~~~~~^ main.cpp:20:26: note: within this loop for (j = 'a' ; j <= 'z' ; ++ j) { ~~^~~~~~ main.cpp:13:10: warning: 'Ans' may be used uninitialized in this function [-Wmaybe-uninitialized] char Ans, Previous(0) ; ^~~