BFS Implementation in C++

What is Breadth First Search(BFS)?

BFS is a graph traversal method that traverses the graph iterative way level by level. That means it traverses the graph “breadth first”, starting from the source then the neighbor of the source then the next level and so on.

For example:

If we traverse the given graph above, the output will be: ‘A’, ‘B’, ‘C’, ‘D’, ‘E’, ‘F’, ‘K’…