一个已经编译并成功运行的CUDA小例程，里面含有三个小函数：Hello CUDA！、修改矩阵、矩阵块加-A little program based on CUDA，including three little functions，like Hello CUDA！、changing matrix、plus between two matrixs

cuda基本入门程序，cuda hello world，适合初学者。-Cuda basic introduction to program, cuda hello world, is suitable for beginners.