Compilare: user.cpp: In member function ‘char file::currentchar()’: user.cpp:22:42: warning: array subscript has type ‘char’ [-Wchar-subscripts] char currentchar() {return buffer[pos];} ^ user.cpp: In function ‘int eval(file*, point, point)’: user.cpp:122:13: warning: unused variable ‘k’ [-Wunused-variable] int k = number(f); ^ user.cpp:131:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^