Question

How to get random pointer form list of pointers ?
I have simple custom class Buildings and list

std::list<Buidldings*> temp;

size of temp is greater than zero. How to get random pointer from list ( 0 – temp.size)?

Answer 1

Use std::rand to pick an appropriate index and then advance an iterator:

assert( !temp.empty() );
std::list<Buidldings*>::const_iterator it = temp.begin();
std::advance( it, std::rand() % temp.size() );
Buidldings *p = *it;