Question

I want to convert an unsigned int and break it into 2 chars. For example: If the integer is 1, its binary representation would be 0000 0001. I want the 0000 part in one char variable and the 0001 part in another binary variable. How do I achieve this in C?

Answer 1

If you insist that you have a sizeof(int)==2 then:

  unsigned int x = (unsigned int)2; //or any other value it happens to be
  unsigned char high = (unsigned char)(x>>8);
  unsigned char low  = x & 0xff;

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If you have eight bits total (one byte) and you are breaking it into two 4-bit values:

  unsigned char x=2;// or whatever
  unsigned char high = (x>>4);
  unsigned char low = x & 0xf;