random integers...help me please!

[rizzix]

its not really all that confusing.. cuz the language is basically the abstraction of the internal on/off, true/false circuit system of the hardware. of course there are layers and layers of this abstraction for various reasons.. and the lowest lever a "software developer" can access is the assembly language.

But... its not necessary to know all the little details.. but a good broad view of the subject is sometimes helpful..

[wtd]

jamonathin wrote:

wtd wrote:

They simply provide a way of turning C++ source code (the stuff humans can read) into machine code. Dev-C++ isn't even a compiler. Rather it's a program that simply uses the GCC compiler and advanced ways to edit and organize C++ source code.

Thats messed up. So why dont people ever learn the machine code, isn't it kinda like cheating then to use other programs? Because how do people write the programs such as Dev C++, by machine code?..... then who invented the machine code, and how did they write that?? it's all messed up to me

Some people do know machine code.

A particular machine's internal "language" is devised by the people who create processors: IBM, Freescale, Intel, AMD, Via, etc.

But machine code is difficult to understand, so we have assembly language. It's much easier to understand, write, and maintain.

It's not good enough.

That's why we have high-level languages.

Also, if you write something in machine code directly, it'll run on exactly one kind of processor, and likely only one operating system. Write it in a high-level language and you can compile it on any system that has a compiler for that language.

Consider that, for instance, I can write:

code:

print_endline "hello world"

And compile it with:

code:

ocamlopt hello_world.ml -o hw

On any of 9 platforms, and it'll go off without a hitch and print "hello world".

This is called abstraction. It's telling the computer what you want it to do, rather than how to do it.

[jamonathin]

Interesting . . .

wtd, what do you do for a living, because you seem know something about everything, you crazy |-|@X0|2

[wtd]

I don't. I'm currently awaiting permission to work in Canada.

On a freelance basis I do web development from time to time. My goal in life is to be a professional student.

[jamonathin]

Are you an american, or some kinda terrorist? If you're goal in life is to be a professional student, my goal is to be your professional teacher.

[jamonathin]

Ok, I'm trying to do a program using random int's but I don't really understand the concept of it. I thought i did earlier, but then I tried it and i was like, wtf mayte?? Is there an easy way of just doing

Turing:

randint (number, 1, 10) %or number := Rand.Int (1, 10)

<blonde moment>

[Andy]

why not actually read the help we've posted in the page before?

[jamonathin]

I tried one of the programs you made, and I tried playing around with one of em, and I cant get anything out of it. And what I got from the original code you made always gave me a number greater than the second number, never a number inbetween. This is what I have so far.

c++:

//generate a random number between a specific range #include <iostream> #include <ctime> using namespace std; int main() {    int m,n;    cin>>m>>n;   // srand((unsigned)time(NULL));    cout<<(rand() % (m,n));    int wait;    cin >> wait;    return 0; }

But it still doesn't work.

[wtd]

What are you trying to do with:

code:

cout << (rand() % (m, n));

Oh, and please use space. It makes code more readable.

[jamonathin]

Sorry, i juss copied and pasted. lol. All i wanted to do is find a random int between m and n, and i was trying to figure out how to do that using the program that finds a random int between a specific range. That program didn't work right and so thats why I was playing with it. I tried lookin it up on the net too, but im havin a brain fart from hell

[md]

Andy wrote:

...
if u want a sepcific range from n to m to then find out how many numbers there are in the range by taking (rand() % (m-n+1))+n

c++:

//generate a random number between a specific range #include <iostream> #include <ctime> using namespace std; int main() {    int m,n;    cin>>m>>n;    srand((unsigned)time(NULL));    cout<<(rand() % (m-n+1))+n;    return 0; }

It looks like you copied this, but didn't quite get it right... I'm sure if you look closely you'll see the problem.

[jamonathin]

Ah, i think I got it. drrrrr, lol. Yeah just that whole (m-n+1) thinger I didn't really understand, cuz I thought it ment more than it does, which is the max amount the rand can produce. Thanks for your help/patience

c++:

//generate a random number between a specific range #include <iostream> using namespace std; int main() {    int m,n;    cin >> m >> n;    cout << (rand() % (n))+ m;    int wait;    cin >> wait;    return 0; }

EDIT: nvm, it pulls up the same number every time, and if you restrict it to that number, it pulls up a different number every time.

[wtd]

jamonathin wrote:

EDIT: nvm, it pulls up the same number every time, and if you restrict it to that number, it pulls up a different number every time.

Because you're no longer seeding it with the time.

[jamonathin]

In conclusion I Hate Random Numbers . I got it to finally work (i had bran flakes this morning) so, sorry for the annoyance I caused you, but I thank you guys for puttin up with it

[betaflye]

jamonathin wrote:

Thats messed up. So why dont people ever learn the machine code, isn't it kinda like cheating then to use other programs? Because how do people write the programs such as Dev C++, by machine code?..... then who invented the machine code, and how did they write that?? it's all messed up to me

Lots of people learn machine code, machine code is worth learning, it should be meantioned it isn't portable among processors or even operating systems. Dev C++ is written in Delphi, afaik.