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how to read & write bits on a file in C

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hi, i am making a compression program using huffman algo,for which i have to read and write on the file in the form of bits. stdio.h does not provide functions for reading and writing bits to a file. if any one knows the solution please reply(please explain in detail). also if someone knows a good site regarding huffman compression do refer it.

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You cannot read or write to a file using bits for units. You must round up to bytes or something that can be composed of bytes (you can access the individual bits of a byte relatively easily using bitwise masking and shifting).

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