这是一个用C语言实现的小项目，开发平台是Dev cpp，基于graphics.h库，程序实现了绘图功能，包括绘制直线、矩形、椭圆等，支持图形拖动和放缩，能够添加文本，可以说是一个简易版的CAD程序，具体功能介绍见资料中的ReadMe.txt(This is a small project implemented in C language. The development platform is Dev cpp. Based on graphics.h library, the program realizes drawing functions, including drawing straight lines, rectangles, ellipses, etc. It supports drawing dragging and zooming, and can add text. It can be said to be a simple version of the CAD program. The specific functions are described in ReadMe.txt in the materials.)