程序利用外接access数据库能计算图的起到到终点的最小时间路径规划，能计算出的路径和时间花费-Map using an external database access computing play to the end of the minimum time path planning algorithm, to calculate the path and time spent

用STL实现简单运算表达式，其中包括加减乘除等，以输入等号为结束标志。-Simple arithmetic expressions, including addition, subtraction, etc., to enter an equal sign marks the end of the STL.

演示了size()，begin()，end()，push_back()，erase()和Insert()的用法-the use of size()，begin(),end(),push_back()