简明清晰的写出每个实验题目的算法步骤，可以混合使用自然语言、流程图及伪代码的方式，不能直接复制源程序。每个实验题目需要附上程序正确运行结果的截图。-Write clear and concise algorithm steps for each experimental subject, can be mixed with natural languages, flowcharts and pseudo code the way, can not be directly copied source. Each experimental subject need to attach a screenshot program correctly operating results. Optionally depth or breadth-first search traversal of the graph to the established order of traversal and output on the screen.