何进入C环境? 窗口的切换 如何打开菜单? 如果将上面的文件存盘? 如何打开一个已经保存好的C源程序 如何编辑,连接并运行程序

TURBO C GRAPHICS INFORMATION AAAAAAAAAAAAAAAAAAAAAAAAAAAA This file contains information about the Turbo c graphics that not contained in the Additions and Enhancements manual. please read this file in its entirety, referring to it when you problems not addressed in the Additions and Enhancements manual

#include void main(int argc, char*argvD int c; FILE fpr, fpd; printf(\这是一个文件复制工具程序的例子n\)

inta=13.b=29, /a,bc为全局变量* int max(int a, int b) /*a,b为局部变量* return(c) /*局部变量a,b的作用范围*