Thread: How to do array subsets?

If you have an array that you want to have a subset of, then you can do this:

Code:

int bigArray[1000];
...
int *subsetArray;
size_t subsetSize
...
subsetArray = &bigArray[someIndex]
subsetSize = 100;
...

--
Mats

A subset of an array is obviously not necessarily "the rest of the array", so you need a size of it. How else would you know how many elements there is in your subset? [Arrays don't have "endmarkers" like strings]. You'd need to pass the size to the function using the subset.

I used size_t because that is the correct type to be used for sizes [it's an unsigned integer that is guaranteed to cover the memory range that a pointer could range through]. If size_t is confusing, think of it as unsigned int.

--
Mats

Why not just make a string by reading 4 bytes into a char array of 5 elements, set the fifth element to zero, and use strcmp?

Or read 4 bytes into a char array and use:

Code:

  if (arr[0] == "M" && arr[1] == "T" && arr[2] == "h" && arr[3] == "d") ...
  else ...

It's not terribly complex.

--
Mats