In olden days, before C++ appeared, it was customary to declare a struct as a typedef name. For example:
typedef struct DATE_TAG { int day; int month; int year; } Date; /* 'Date' is a typedef */This way, one could create an instance of the struct without having to use the keyword ‘struct’:
/* C code */ Date date; /* typedef; 'struct' not required */ struct DATE_TAG another_date; /* 'struct' is required */In C++, the use of a typedef in this context is unnecessary because you don’t need the elaborated type specifier (i.e., struct, union, and class) to create an instance:
// C++ code DATE_TAG another_date; // 'struct' not required in C++Therefore, you shouldn’t declare structs as typedef names anymore.
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