Compilare: main.cpp: In function 'int getOpType()': main.cpp:151:11: warning: array subscript has type 'char' [-Wchar-subscripts] 151 | s[i] = ch; | ^ main.cpp:152:7: warning: array subscript has type 'char' [-Wchar-subscripts] 152 | s[i] = '\0'; | ^ main.cpp:154:27: warning: array subscript has type 'char' [-Wchar-subscripts] 154 | if (cmpStr(s, ops[i])) | ^ main.cpp:156:1: warning: control reaches end of non-void function [-Wreturn-type] 156 | } | ^