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drmn2
How do I cheat?
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Joined: 01 Mar 2012
Posts: 3
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 Posted: Thu Mar 01, 2012 3:50 pm Post subject: What are bytes,pointers,offsets? |
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hey everyone i just downloaded cheat engine and started out the tutorial and everything is fine but there are some terms im not famillar with and i'd be happy if someone explained to me
alright first of all what are:
1.bytes(whats the difference between 2,4,8,float,double)
2.pointers
3.offsets
4.array of bytes(how are they different from normal bytes)
thank you!
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abystus
Expert Cheater
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Joined: 09 Dec 2010
Posts: 140
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| Posted: Fri Mar 02, 2012 12:10 am Post subject: Re: What are bytes,pointers,offsets? |
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| drmn2 wrote: | | whats the difference between 2,4,8,float,double |
Depending on the "size" (2 bytes, 4 bytes, 8 bytes, float, and double) of the value your looking for, it will fit into one of the below categories:
| Code: | char Character or small integer. 1byte signed: -128 to 127 unsigned: 0 to 255
short int (short) Short Integer. 2bytes signed: -32768 to 32767 unsigned: 0 to 65535
int Integer. 4bytes signed: -2147483648 to 2147483647 unsigned: 0 to 4294967295
long int (long) Long integer. 4bytes signed: -2147483648 to 2147483647 unsigned: 0 to 4294967295
bool Boolean value. It can take one of two values: true or false. 1byte true or false
float Floating point number. 4bytes +/- 3.4e +/- 38 (~7 digits)
double Double precision floating point number. 8bytes +/- 1.7e +/- 308 (~15 digits)
long double Long double precision floating point number. 8bytes +/- 1.7e +/- 308 (~15 digits)
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Each byte can hold the values 0-255, and when that limit is exceeded the remainder is housed in another address next to it. The larger the number, the more bytes it will need to be stored.
Pointers "point" to another location in memory (usually a base address), but can also point to other pointers. If an address is not specifically defined within the instruction, then it is being "pointed" to via a [register + offset].
An offset is used to indicate the distance (displacement) from the beginning of the object up until a given element or point. Offsets will be within the [ ] section of ASM, and will look similar to [EAX + 5], where 5 would be the offset, and the address index in EAX would be increased by 5 (because it says + 5 in the instruction).
| drmn2 wrote: | | array of bytes(how are they different from normal bytes) |
Think of an array of bytes as a collection of normal bytes that are indexed. Say you have an array that holds 50 entries (as type byte()), then each entry 0-50 would be a single byte. Byte arrays are used to hold as many bytes as you specify the maximum index to be, and is generally easier than the programmer having to manually declare each byte as a separate memory location.
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