View Compilation Error

674131_0_0_9676.cpp: In function `void BFS(int, int)':
674131_0_0_9676.cpp:39: error: return-statement with a value, in function returning 'void'
674131_0_0_9676.cpp:41: error: return-statement with a value, in function returning 'void'
674131_0_0_9676.cpp: In function `int main()':
674131_0_0_9676.cpp:75: error: void value not ignored as it ought to be
674131_0_0_9676.cpp:75: error:   in evaluation of `operator<?=(int, void)'