#include<graphics.h>
#include<stdio.h>
main()
{
     int graphdriver=VGA;
     int graphmode=VGAHI;
     initgraph(&graphdriver,&graphmode,"");
     cleardevice();
     moveto(100,20);
     lineto(100,80);
     moveto(200,20);
     lineto(100,80);
     line(100,90,200,90);
     linerel(0,20);
     moverel(-100,0);
     linerel(30,20);
     getch();
     closegraph();
     return 0;


}

错误信息：
---------- Compiler Link ----------
Invalid keyboard code specified
Turbo C++ Version 3.00 Copyright (c) 1992 Borland International
e:\c\cdemo\test1.c:
Turbo Link  Version 5.0 Copyright (c) 1992 Borland International
Error: Undefined symbol _closegraph in module e:\c\cdemo\test1.c
Error: Undefined symbol _linerel in module e:\c\cdemo\test1.c
Error: Undefined symbol _moverel in module e:\c\cdemo\test1.c
Error: Undefined symbol _line in module e:\c\cdemo\test1.c
Error: Undefined symbol _lineto in module e:\c\cdemo\test1.c
Error: Undefined symbol _moveto in module e:\c\cdemo\test1.c
Error: Undefined symbol _cleardevice in module e:\c\cdemo\test1.c
Error: Undefined symbol _initgraph in module e:\c\cdemo\test1.c

        Available memory 4125248

Output completed (0 sec consumed)

Wintc下编译通过，你用的是TC++,应该是graphics库的图像函数有改动，去include 文件里看看吧

LZ是某位原版主的马甲。。。？

什么意思？？

只是随便问问，我好久没来了，原来的版主都不见了呢：）

嗷嗷@@知道了！！