Thread: simple pointers question

Hello, I have two pointers:

unsigned char *rdata
and unsigned char *rdata_tail

rdata_tail will always represent a memory location greater than or equal to rdata

Let's say the memory that rdata starts at is like such: "hello"

(but the program doesnt know this)

rdata_tail gives the memory address after "o"

My question is, how do I get the number 5 using these 2 pointers?


Thanks