Turbo C equivalent command in Visual C

[Zulfi Khan2]

Hi,
I am using visual C 6.0. I have a code in turbo which uses following command:

randomize();
dx1=random(c2)-c3;

where

   int random (int num )

returns a number between 0 and (num-1)

The visual C code is:

int I = IMin + rand() % (IMax - IMin + 1);

So its confusing. Can somebody guide me how to convert from Turbo C to Visual C??

Zulfi.

[2kaud]

The 'standard' c function to obtain a pseudo-random number is rand(). It returns a pseudo-random number between 0 and RAND_MAX. See http://msdn.microsoft.com/en-us/library/398ax69y.aspx. Also see srand() to 'seed' the random number generator. If you want a number between a range then this needs to be programmed. See the example of producing a number within a range in the previous link (RangedRandDemo()).

If you can use c++11 instead of c, there are several much-improved methods of obtaining random numbers available. See
http://www.cplusplus.com/reference/random/

[Zulfi Khan2]

Hi,
Thanks for your response. Plz provide me the specific command to convert my TC code into VC. I have shown you the TC code. Plz show me how to convert it into VC?
Hope to get a response for this.
Zulfi.

[2kaud]

There is no specific command to convert from using Turbo-C random() to visual-c rand(). I suggest you create a function called random() that takes as an argument the required max value (which must be no greater than RAND_MAX (32767). Something like this

int random(int num)
{
      return rand() % num;
}

You can also create a function called randomize() to replace the one you use. Something like

void randomize()
{
     srand( (unsigned)time( NULL ) );
}

Note that you'll need to include time.h (and also stdlib.h if you aren't already).

[Zulfi Khan2]

Hi,
Thanks. Good work.

Zulfi.

[Vanaj]

Hi,
Thanks. Good work.

Zulfi.

Isn't this pretty much the same answer you got in this thread ??

Please don't double post problems...

And if you google srand(int) you will find 730,000 results and probably all with examples.

http://forums.codeguru.com/showthrea...domize-%28-%29

[razzle]

So its confusing. Can somebody guide me how to convert from Turbo C to Visual C??

If you want to stick with C, rand() is fine. Here are a couple of references,

http://www.eternallyconfuzzled.com/a..._art_rand.aspx

http://www.cplusplus.com/articles/EywTURfi/

But if randomness is important in your application and you're using C++ then you definately should consider <random>. It's part of the C++ 11 standard library so you'll have to upgrade. It's a little harder because it's more flexible and versatile but it's worth it.

[Zulfi Khan2]

Hi,
Thanks razzle for your update. Actually I am using VC6.0. I can install VS2010. Is random ( ) available in Visual Studio 2010??

Zulfi.

[2kaud]

Thanks razzle for your update. Actually I am using VC6.0. I can install VS2010. Is random ( ) available in Visual Studio 2010??

No. Random() and randomize() are Turbo c specific library extensions - although you now have replacement functions for them. The <random> classes are part of c++11 and are included in VS2010. I would strongly recommend that you use VS2010 rather than VC6 if you have it.