rand() was not declared in this scope, please help‏

[Václav Haisman]

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eric lin wrote, On 8.9.2010 19:35:
> dear cygwin/gcc users:
>  
>   I compile a simple code which i copied from a book, "The Complete Reference of C++"  Fourth Edition by Herbert Schildt in page 575, rand()
> which is clearly not be included in
> #include <iostream>
>  
> I tried 
> #inlcude <cmath>
>  
> it still not compile, i.e. same compile error
>  
> please help(see which lib I should include)
> /* I tried in ubuntu linux on my laptop, it also not compile by same reason */
You need to #include <cstdlib> and use std::rand().

- -- 
VH
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