How to pick a random number from an array

[Bleedz129]

Basically we have this 7 bit binary code, and i would like to pick out 3 numbers randomly from it, how do we do that ?

for example 1011101

int Num[7];

	for(int i=6; i>=0 ; i--)
		{Num[i] = binary % 2;
	binary = binary/10;}

[Bourgond Aries]

Use the random number generators like std::mt19937 or std::rand(), documentation: http://en.cppreference.com/w/cpp/numeric/random/rand

[abhishekm71]

You can also use std::shuffle() and pick the 1st three numbers after shuffling.

[Bourgond Aries]

I suppose that's correct, altho it would always take more CPU time to shuffle than to generate 3 random numbers and use those as indices.