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unsigned int type:4;

unsigned int my_int:9;

} pack;

Here, the packed_struct contains 6 members: Four 1 bit flags f1..f3, a 4-bit type, and a 9-
bit my_int.
C automatically packs the above bit fields as compactly as possible, provided that the
maximum length of the field is less than or equal to the integer word length of the computer. If
this is not the case, then some compilers may allow memory overlap for the fields, while others
would store the next field in the next word.

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