求助:关于图形函数-->soft_wind转移

#include<graphics.h>
void main()
{
int gdriver,gmode;
detectgraph(&gdriver,&gmode);
printf("the graphicsdriver is %d, mode is %d\n",driver,gmode);
}


为什么提示undefined symbol _detectgraph in module NONAME00.C
请各位指点迷津,谢谢!!!