Added code for Numbers of Islands in C++ #629
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Added a code for problem statement Number of islands ( leetcode 200) in C++.
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Added a code for problem statement Number of islands ( leetcode 200) in C++ using BFS traversal.
Approach to solve the problem
1)Check 4 directions from each place
2)If we find "1" and the place is not visited yet, keep it.
This algorithm will visit all "1" places with one BFS operation if the places are connected in the same island, that means every time we start new BFS operation, the place is one of new islands.