vc6.0实现的成绩输入并能用直方图和饼状图来统计输入的成绩；可采用文档批处理方式和界面输入方式，可直接参考例子来使用直方图和饼状图的实现过程-vc6.0 achieve results and can be input histograms and pie charts to enter statistical results can be used in batch mode and document input interface, can be directly used with r