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Many times in C, data must be accessed in a bitwise fashion. Usually, programmers will use the char type to represent a quick and easy byte. However, when bit flipping is necessary, this bandaid solution fails to deliver. Using the following technique will create a variable type that lets the programmer work with bits on an individual basis. struct binary{ union the_data{ unsigned b_0:1; unsigned b_1:1; unsigned b_2:1; unsigned b_3:1; unsigned b_4:1; unsigned b_5:1; unsigned b_6:1; unsigned b_7:1; unsigned char all:8; } data; }; To use the structure: struct binary variable_name;variable_name.data.all = 1; printf("%u\n", variable_name.data.b_7); /* Depending on the machine, b_7 might be 1, or b_0 might be 1. */ A link that provides more information on bit fields. |
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Binary Central by Anman: "http://www15.brinkster.com/anman/" |
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