Question

I need some help regarding algorithm for randomness. So Problem is.

There are 50 events going to happen in 8 hours duration. Events can happen at random times. Now it means in each second there is a chance of event happening is 50/(8*60*60)= .001736. How can I do this with random generation algorithm?

I can get random number

int r = rand(); double chance = r/RAND_MAX; if(chance < 0.001736)     then event happens else     no event 

But most of times rand() returns 0 and 0<0.001736 and I am getting more events than required.

Any suggestions?

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sorry I forget to mention I calculated chance as double chance = (static_cast )(r) / (static_cast)(RAND_MAX);

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It removed double from static_cast

double chance = (double)r/(double)(RAND_MAX);

Answer 1

• Create a list of 50 numbers.
• Fill them with a random number between 1 and 8 * 60 * 60.
• Sort them

And you have the 50 seconds.

Note that you can have duplicates.