a、要求已知一个关系矩阵R，利用warshall算法求它的闭包R+

b、有良好的用户界面

c、有一个用于演示warshall算法的demo关系矩阵

d、能够求出用户输入的任何关系矩阵的闭包

e、能够将用户要求的结果清晰的显示在终端上

-a, a requirement known matrix R, warshall algorithm for the use of its closure R b, a good user interface c, an algorithm for demonstrating warshall demo matrix d, user input can be obtained in any relationship matrix Closure e, can be user requirements the results clearly show that the terminal