Compilare: main.cpp: In function 'int getOpType()': main.cpp:154:11: warning: array subscript has type 'char' [-Wchar-subscripts] 154 | s[i] = ch; | ^ main.cpp:155:7: warning: array subscript has type 'char' [-Wchar-subscripts] 155 | s[i] = '\0'; | ^ main.cpp:157:27: warning: array subscript has type 'char' [-Wchar-subscripts] 157 | if (cmpStr(s, ops[i])) | ^ main.cpp:159:1: warning: control reaches end of non-void function [-Wreturn-type] 159 | } | ^