tc3.0的问题

我的在TC3.0中运行下面程序时:

/* hello.c */

#include<graphics.h>

#include<stdio.h>

#include<conio.h>

void main()

{

int b;

int gdriver=DETECT,gmode;

initgraph(&gdriver,&gmode,"c:\\tc");

cleardevice();

printf("\n\n\n this program shows the circle graph.\n");

for(b=10;b<=140;b+=10)

circle(320,240,b);

getch();

closegraph();

}

编译没有错误,而在运行时却出现下面下列错误:

║•Linker Error: Undefined symbol _closegraph in module STU\HELLO.C ▒

║ Linker Error: Undefined symbol _circle in module STU\HELLO.C ▒

║ Linker Error: Undefined symbol _cleardevice in module STU\HELLO.C ▒

║ Linker Error: Undefined symbol _initgraph in module STU\HELLO.C ▒

请问C语言高手们这是什么错误,应该怎样修改.

连接出现错误,应该是TC的文件受到损坏了,或者你使用了不存在的连接库,尝试重新安装TC看看