Compilare: main.cpp: In function 'void eval(int)': main.cpp:35:27: warning: array subscript has type 'char' [-Wchar-subscripts] while(p[op[k2]] > p[S2[i]]) ^ main.cpp:35:38: warning: array subscript has type 'char' [-Wchar-subscripts] while(p[op[k2]] > p[S2[i]]) ^ main.cpp: In function 'int main()': main.cpp:79:42: warning: array subscript is below array bounds [-Warray-bounds] if(1 - val[S[j] - 'A' + 1] == 0) ~~~~~~~~~~~~~~~~~~^