Borderou de evaluare (job #33063)

Compilare: user.c: In function ‘Expr’: user.c:39:2: warning: array subscript has type ‘char’ [-Wchar-subscripts] user.c: In function ‘main’: user.c:74:3: warning: array subscript has type ‘char’ [-Wchar-subscripts] user.c:80:4: warning: array subscript has type ‘char’ [-Wchar-subscripts] user.c:67:8: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] user.c:72:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result]