Few programmers consider the issues around formatted I/O and typedefs. A user-defined integer type might be any type supported by the implementation, even a type larger than unsigned long long, for example:
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typedef mytypedefuint_fast128_t uint_fast128mytypedef_t; |
Furthermore, the definition of user defined types may change (which may be one of the reasons the user-defined type was created to begin with). This creates a problem using these types with formatted output functions (such as printf()) and formatted input functions (such as scanf()) (see FIO00-A. Take care when creating format strings).
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