使用深度、广度、A星算法解决了九宫重拍问题，使用C语言实现，简单易懂。-Use depth and breadth, A star algorithm can solve the problem, use nine-palaces remake C language realization, simple and understandable.

ssd3答案,包括练习1到练习8，和日常练习1到9-the answer of the ssd3,including the exercise and the practical quiz.The exercise one to eight and the practical quiz one to nine.Exercise 1.ShoppingCartApplication