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Exercise 4: Bit Manipulation

  1. Write a function to display uint32 values as 01010110... 

    char *showBits(uint32 val, char *buf);

    Analogous to gets()   (assumes supplied buffer large enough)


  2. Write a function to extract the d bits of a uint32 

    uint32 bits(int d, uint32 val);

    If d > 0, gives low-order bits; if d < 0, gives high-order bits