Compilare: main.cpp: In function 'int getOpType()': main.cpp:152:11: warning: array subscript has type 'char' [-Wchar-subscripts] 152 | s[i] = ch; | ^ main.cpp:153:7: warning: array subscript has type 'char' [-Wchar-subscripts] 153 | s[i] = '\0'; | ^ main.cpp:155:27: warning: array subscript has type 'char' [-Wchar-subscripts] 155 | if (cmpStr(s, ops[i])) | ^ main.cpp:157:1: warning: control reaches end of non-void function [-Wreturn-type] 157 | } | ^