C / C++ standard integer types

Some code may have integer declarations like u_int, u_long, etc. These types are not part of the C or C++ standard and may not be portable across different platforms. Instead, it’s recommended to use the standard integer types, including those defined in <stdint.h> (C) or <cstdint> (C++). For example, replace “u_int” with unsigned int or a fixed-width type appropriate for the use case. “u_int” is from header <sys/types.h> and is not part of the C standard, and it may not be available on systems like Windows.