Suppose I have:
unsafe {
byte* start = GetStartLocation();
int something = start[4];
}
What is something? The value of the memory address 4 bytes down from start?
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3 Answers
Say start points to memory location 0x12345678, and memory looks like this:
0x12345678 0x12
0x12345679 0x34
0x1234567a 0x56
0x1234567b 0x78
0x1234567c 0x9a
0x1234567d 0xbc
then something equals 0x9a.
The fact that something has type int doesn't matter to how start[4] is interpreted - it gets the byte value of the byte 4 locations away from start.
2 Comments
xofz
Thank you! I need to enter 15 characters to post this, which leads me to believe that 'thank you's in general are not allowed, which means this will be deleted shortly, so I hope you see this! Thanks!
RichieHindle
@Sam: Personally, I think the more "thank you"s on SO the better. Feel free to pad them with smileys as necessary. 8-)
The value of something is the byte value of offset 4 from start widened to an int type.
It's equivalent to the following code
byte temp = start[4];
int something = temp;
Comments
start[4] will evaluate to:
*(start + 4)
