Generating a random number

[ahmed sobhy]

I am trying to generate a random number between i and j.

 

The code at the bottom always generates the same number which is 42.

 

How can I fix this ?

 

 

int RandInt (int i , int j)

{

return rand( ) % (j-i+1) + i ;

}

[Cap'n Refsmmat]

Is this C?

 

Have you seeded the random number generator before using it? If you don't, it'll be seeded with the same value each time you run the program, and it will generate the same sequence of random numbers every time.

[ahmed sobhy]

it is c++ , can you help with the code ?

[Cap'n Refsmmat]

As I said, have you seeded the random number generator?

[ahmed sobhy]

no I didn't. How can I do it using the c++?

[Cap'n Refsmmat]

http://www.cplusplus.com/reference/clibrary/cstdlib/srand/

[Schrödinger's hat]

Oblig

http://xkcd.com/221/

[John Cuthber]

Optional Dilbert cartoon.

http://dilbert.com/strips/comic/2001-10-25/