Web Reference: Sep 13, 2012 · That particular way of doing it is not explicitly defined in any C standard, but C99 does include the "struct hack" as part of the language. In C99, the last member of a struct may be a "flexible array member", declared as char foo[] (with whatever type you desire in place of char). Sep 6, 2021 · This technique is known as "Struct Hack". When we create array of zero length inside structure, it must be (and only) last member of structure. Shortly we will see how to use it. "Struct Hack" technique is used to create variable length member in a structure. Structures (also called structs) are a way to group several related variables into one place. Each variable in the structure is known as a member of the structure. Unlike an array, a structure can contain many different data types (int, float, char, etc.).
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