RAND GENERATOR IN C++

[HUNGER]

HI,

I need to generate a long random number upto 4 byte width

but my compiler is generating 2 byte int type as RAND_MAX

i want to genetrate a rand num like 123456789 that long

plz help me.

thanks for helping

 

[Jørn Dahl-Stamnes]

HI,

I need to generate a long random number upto 4 byte width

but my compiler is generating 2 byte int type as RAND_MAX

i want to genetrate a rand num like 123456789 that long

plz help me.

thanks for helping

Something like:

randomnumber1 = rand();
randomnumber2 = rand();
longrandomnumber = (randonumber1 << 16) | randonmumber2;

Better ways to generate 4 byte randon mumber can be found on the Internet.

Jørn Dahl-Stamnes, EDB Teamco AS
e-mail: (e-mail address removed) (remove nospam first)
web: http://spiderman.novit.no/dahls/

 

[Guest]

I need to generate a long random number upto 4 byte width

randomnumber1 = rand();
randomnumber2 = rand();
longrandomnumber = (randonumber1 << 16) | randonmumber2;

I use this too, but I have something else:

So, It is in x86 Assembly, I convert it ;-)
--------- seed is the seed ;-) -----------
mov eax, [seed]
mul eax, 343fdh
add eax, 269ec3h
mov [seed],eax
---------first time random = seed-------
random = random * 0x343fd + 0x269ec3;

 

[Jesper Madsen]

Look at a http://www.math.keio.ac.jp/matumoto/emt.html it is really good.