Structure Padding C Programming Tutorial IDD6qk8Amlw

Web Reference: Jul 29, 2025 · In this article, we will discuss the property of structure padding in C along with data alignment and structure packing. Each data type has a natural alignment requirement, determined by the CPU architecture. Historically memory is byte addressable and arranged sequentially. What is Structure Packing in C? Structure packing, on the other hand, is a mechanism for minimizing the effect of padding, thereby trying and reduce wasted memory space. We can use certain pragma directives and attributes to achieve packing. When you create a struct in C, the compiler may add some extra bytes of padding between members. This is done to make the program run faster on your computer, because most CPUs read data more efficiently when it's properly aligned in memory.

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