Compilare: main.cpp: In function 'void sol(bool)': main.cpp:19:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (poz < sir.size() && (sir[poz] == '*' || sir[poz] == '/')) ~~~~^~~~~~~~~~~~ main.cpp: In function 'void termen(bool)': main.cpp:40:25: warning: array subscript has type 'char' [-Wchar-subscripts] exp[sir[poz]]++; ^ main.cpp:41:28: warning: array subscript has type 'char' [-Wchar-subscripts] exista[sir[poz]] = true; ^ main.cpp:45:25: warning: array subscript has type 'char' [-Wchar-subscripts] exp[sir[poz]]--; ^ main.cpp:46:28: warning: array subscript has type 'char' [-Wchar-subscripts] exista[sir[poz]] = true; ^