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Coding a binary data

Sébastien HAROUET

Hello,

I just want to code a binary data in C.
I mean hera representation is "0x5F", the decimal representation is simply "156" but what is the decimal representation.
I tried 0b010010101 but it doesn't work

Many thanks

Sébastien

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  • 0

    C doesn't support binary numerical constants (see K&R). Perhaps a simple macro could help:

    #define BIN(b7,b6,b5,b4,b3,b2,b1,b0) ((b0)+((b1)<<1)+((b2)<<2)+((b3)<<3)+((b4)<<4)+((b5)<<5)+((b6)<<6)+((b7)<<7))

    Then your constant would look like this:

    int i = BIN(1,0,0,1,0,1,0,1);

    Of course, you can extend the macro to suport a greater number of bits.
    Regards,
    Mike.

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  • 0

    C doesn't support binary numerical constants (see K&R). Perhaps a simple macro could help:

    #define BIN(b7,b6,b5,b4,b3,b2,b1,b0) ((b0)+((b1)<<1)+((b2)<<2)+((b3)<<3)+((b4)<<4)+((b5)<<5)+((b6)<<6)+((b7)<<7))

    Then your constant would look like this:

    int i = BIN(1,0,0,1,0,1,0,1);

    Of course, you can extend the macro to suport a greater number of bits.
    Regards,
    Mike.

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