C++ rand() function trouble?

I have the following code in a program that compiles ok, and runs without crashing, but it only ever executes the first 2 switch cases. In fact, It almost always executes case 0, and rarely case 1.





How can I get the program to occasionally run one of the other 2 cases?





... //other code


#include %26lt;ctime%26gt;


#include %26lt;cstdlib%26gt;


... //other code


int randNum;


srand(time(0));





do


{


randNum = rand() % 4;


switch(randNum)


{


case 0:


//code


break;


case 1:


//code


break;


case 2:


//code


break;


case 3:


//code


break;


default:


//code


break;


}


}


while(condition);





P.S. forgive the bad formatting, I can't seem to make things indent properly.

C++ rand() function trouble?
It looks right from what you have there. Here's a video explanation of how the function works:





http://xoax.net/comp/cpp/console/Lesson2...





You might try a simpler example to and make some variations to make sure that your compiler implementation is correct. However, the rand() should generate a uniform distribution.
Reply:Where is it called "randomize()"? It's called srand() in Linux usually.


BTW, using the modulus may not be the best adivce. If this is Linux, I'd try something like:


randNum = rand()*4/(RAND_MAX + 1);
Reply:Call randomize() after the line 'randNum = rand() % 4;'


It will help to generate different different numbers in the particular range

magnolia