Compilare: main.cpp: In function 'int getOpType()': main.cpp:135:11: warning: array subscript has type 'char' [-Wchar-subscripts] 135 | s[i] = ch; | ^ main.cpp:136:7: warning: array subscript has type 'char' [-Wchar-subscripts] 136 | s[i] = '\0'; | ^ main.cpp:138:27: warning: array subscript has type 'char' [-Wchar-subscripts] 138 | if (cmpStr(s, ops[i])) | ^ main.cpp:140:1: warning: control reaches end of non-void function [-Wreturn-type] 140 | } | ^