屏幕图形的多功能打印

Multifunction printout for screen pictures

介绍了一个以Ｃ语言编制的多功能图形打印函数，讨论了其图区选定、图形拷贝、图形旋转、镜像和旋转镜像混合打印功能的特点和实现方法，并说明该函数的用法．

This paper introduces a multiprint function for screen pictures programed with C language which mainly discusses how to define regions, copy graphs, rotate graphs, and how fo print out mirror images and rotating mirror images.Meanwhile, it provides applicable method of the function.