函数名: bar3d

功 能: 画一个三维条形图

用 法:

void far bar3d(

int left, int top,// 三维空间矩形长条图正面的左上角坐标

int right, int bottom, //三维空间矩形长条图正面的右下角坐标

int depth, //三维空间矩形长条图的深度（即阴影）

int topflag//设置是否绘制三维空间矩形长条图的顶部

);

程序例:

#include <graphics.h>

#include <stdlib.h>

#include <stdio.h>

#include <conio.h>

int main(void)

{

/* request auto detection */

int gdriver = DETECT, gmode, errorcode;

int midx, midy, i;

/* initialize graphics, local variables */

initgraph(&gdriver, &gmode, "");

/* read result of initialization */

errorcode = graphresult();

if (errorcode != grOk) /* an error occurred */

{

printf("Graphics error: %s\", grapherrormsg(errorcode));

printf("Press any key to halt:");

getch();

exit(1); /* terminate with error code */

}

midx = getmaxx() / 2;

midy = getmaxy() / 2;

/* loop through the fill patterns */

for (i=EMPTY_FILL; i<USER_FILL; i++)

{

/* set the fill style */

setfillstyle(i, getmaxcolor());

/* draw the 3-d bar */

bar3d(midx-50, midy-50, midx+50, midy+50, 10, 1);

getch();

}

/* clean up */

closegraph();

return 0;

}