Compilare: main.cpp: In function 'int b12(char*)': main.cpp:38:21: warning: array subscript has type 'char' [-Wchar-subscripts] nr += v[s[i]] * p[5-i-1]; ^ main.cpp: In function 'void read()': main.cpp:53:13: warning: array subscript has type 'char' [-Wchar-subscripts] v[ch] = i + 1; ^