基于NV的CUDA（计算统一构架）的一段程序，示例如何在显卡的GPU上进行并行平方和运算，代码思路清晰，易于理解。-NV based on the CUDA (calculated unified framework) period of procedures, examples of how the GPU graphics cards on the square and parallel computing, code clear and easy to understand.

用CUDA实现BFS算法源码。CUDA是NV公司基于GPU的统一计算架构，BFS复杂度由CPU上的O(V+E)降为O(diameter)，直径diameter即图中root到leaf的最长距离。-This is the algorithm of BFS(breadth first search) on CUDA, and its time complexity is down to O(diameter) which diameter means the longest distance bet