本程序的功能是对图的着色，该算法主要是基于迭代回溯法，输出多种着色方案；若有n种颜色就输出n种着色方案。本程序有注释，通俗易懂。-The functionality of the program is the graphs, the algorithm is mainly based on iterative backtracking, the output multi-color scheme if n different colors on the output of n kinds of