random subset made by random selection of different elements from a given set
Hey all,
My name is Elshadai, I am just a beginner in C/C++. I want to write a code in C/C++ the can select randomly a subset of integers both different from a given set. To be more concrete I have the following situation: A=[1,2,3,4,5,6,7,8,9,10], I want to make a subset of 4 elements from A whose element are chosen from A randomly and those element must be different from each other. I need a sets like : B=[1,7,4,9] or C=[2,10,7,1] or D=[10,3,5,6] .... Is there any one can help me? Thank you so much 
Re: random subset made by random selection of different elements from a given set
Pick 4 random numbers. Check if any are equal. If they are, change one. Repeat until you have no more duplicates.

Re: random subset made by random selection of different elements from a given set
Thank you for you idea,
the problem is how to do what u say in c/c++? 
Re: random subset made by random selection of different elements from a given set
Do you know how to pick one random number?

Re: random subset made by random selection of different elements from a given set
for random numbers check here
http://www.java2s.com/Code/C/Math/Ge...wtouserand.htm 
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