Compilare: main.cpp: In function 'bool verif_sir(char*)': main.cpp:34:23: warning: array subscript has type 'char' [-Wchar-subscripts] stiva[++vf] = '('; ^ main.cpp:38:23: warning: array subscript has type 'char' [-Wchar-subscripts] stiva[++vf] = '['; ^ main.cpp:43:25: warning: array subscript has type 'char' [-Wchar-subscripts] if (stiva[vf] == '(' && vf > 0) ^ main.cpp:54:25: warning: array subscript has type 'char' [-Wchar-subscripts] if (stiva[vf] == '[' && vf > 0) ^ main.cpp: In function 'int main()': main.cpp:96:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < strlen(s); ++j) ~~^~~~~~~~~~~