用VC++编写饼图直方图用以表示北京市人口分布-Prepare a pie chart with VC++ to indicate the Beijing population distribution histogram

灰色预测和残差检验 可用于预测人口等功能 也可以预测一些数据-Gray prediction and residual test can be used to predict the population of other functions can also predict some of the data

利用Matlab实现logistic模型求人口阻滞增长的代码-Logistic model using Matlab code required population growth arrest