如何检查十六进制数是否等于特定的二进制数？

Question

Hi I'm trying to do something which should be simple, but I can't figure it out. I have a pointer to an array of unsigned chars, and I get the first element, which is a hex number. I want to convert it to binary so I can check if it's equal to a number such as 0x01101000.

      unsigned char arr[] = {0x25};  //just for example. I am actually using *arr.
      unsigned char byte = arr[0];
      if(( byte & 0x01101000) == //not sure if this is the right way to proceed

Would appreciate some help! Thanks!!

Answer 1

See this answer.

If you are using GCC then you can use GCC extension for this: int x = 0b00010000;

So in your case, it would be:

if( byte == 0b01101000 )
...

Be sure to put only 8 bits in your literal though.