编程环境为tc3.0,Alt+F9编译通过，按F9或CTRL+F9出现linker error.如图所示。请高人指点
源吗如下，是一个示例程序
// Borland C++ - (C) Copyright 1991 by Borland International

// BARCHART Example Program

#include <stdio.h>
#include <stdlib.h>
#include <float.h>
#include <graphics.h>
#include <math.h>
#include <conio.h>

#define MAX 50
#define ARRAYMAX 10

void makegraph(float p[]);

void main(void)
{
int i;
int scores[ARRAYMAX];
float percents[ARRAYMAX];

for (i = 0; i < ARRAYMAX; i++)
{
printf("\nEnter score between 0 and %d: ", MAX);
scanf("%d", &scores[i]);
}
for (i = 0; i < ARRAYMAX; i++)
percents[i] = ((float) scores[i]) / MAX;

printf("\n\n\n\tSCORE\tPERCENT");
for (i = 0; i < ARRAYMAX; i++)
printf("\n%d. \t%d\t%3.0f", i + 1, scores[i], (percents[i] * 100));
getch();
makegraph(percents);
}

void makegraph(float p[])
{
int g_driver, g_mode;
int i, left, top, wide, bottom, deep;

detectgraph(&g_driver, &g_mode);
initgraph(&g_driver, &g_mode, "..\\bgi");
wide = (int)((getmaxx()) / ((ARRAYMAX * 2 ) + 1));
bottom = getmaxy() - 20;
deep = (int) (wide / 4);
left = wide;
for (i = 0; i < ARRAYMAX; i++)
{
top = (bottom) - ((int)(p[i] * 300));
bar3d(left, top, (left + wide), bottom, deep, 1);
left += (wide * 2);
}
getch();
closegraph();
return;
}