Programming in C · topic
Structure layout with implementation-defined padding, sizeof and offsetof, unions, enumerations, typedef, member access through pointers, structure copy and comparison, and bit fields.
A structure groups values of different types into one object, such as a student record with a name and marks, or a list node with a key and a pointer to the next node. A union lets several members share the same storage, so that the object holds one of them at a time.
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