Compilare: user.cpp: In member function ‘virtual int Variable::eval(ValueTable*)’: user.cpp:131:42: warning: array subscript has type ‘char’ [-Wchar-subscripts] return pValueTable->m_value[m_ref]; ^ user.cpp: In function ‘int main()’: user.cpp:277:25: warning: array subscript has type ‘char’ [-Wchar-subscripts] vtable.m_value[c] = !vtable.m_value[c]; ^ user.cpp:277:46: warning: array subscript has type ‘char’ [-Wchar-subscripts] vtable.m_value[c] = !vtable.m_value[c]; ^ user.cpp: In function ‘Block* ParseOrExpr(file*)’: user.cpp:292:9: warning: unused variable ‘id’ [-Wunused-variable] int id = OrId++; ^ user.cpp: In function ‘int main()’: user.cpp:266:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, " %d ", &n); ^ user.cpp:273:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, " %c", &c); ^