On 05/08/2009, at 8:44 PM, Mahaboob wrote:

I need to produce 15 random numbers between 1 to 16 without repeating any
number. I used the code like

   int i,j;
   for(i=0;i<15;i++){
       j =random() % 15 +1;
       NSLog(@"No: %d => %d \n",i,j);
       srandom(time(NULL)+i);
   }
But some numbers are repeating.
How can I do it without repeating the numbers?


A truly random number may be repeated. If it's guaranteed not to, it's not random.

Maybe you're really just trying to randomly order a number of objects? One way to do that is to assign a random number to each object and sort the list on the random number.

--Graham


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