程序如下：

#include"graphics.h"

#include"math.h"

main()

{

int x,y,a,b,h,l,r,driver,mode;

float n=1;

driver=VGA,mode=VGAHI;

initgraph(&driver,&mode,"");

setcolor(GREEN);

setbkcolor(BLACK);

printf("please enter x,y,a,b,h,l,r:");

scanf("%d%d%d%d%d%d%d",&x,&y,&a,&b,&h,&l,&r);

setlinestyle(0,0,1);

rectangle(x-2*r,y-2*h,x,y);

rectangle(x-2*r,y-h,x,y);

line(x+a,y-2*h,x+a,y);

line(x+a,y,x+a+2*l+r,y);

line(x+a+2*l+r,y,x+a+2*l+r,y-h);

line(x+a,y-2*h,x+a+l,y-2*h);

line(x+a+l,y-2*h,x+a+l,y-h);

line(x+a+l,y-h,x+a+2*l+r,y-h);

rectangle(x-2*r,y+b,x,y+b+l);

line(x-2*r,y+b+l,x-2*r,y+b+2*l);

line(x,y+b+l,x,y+b+2*l);

arc(x-r,y+b+2*l,180,0,r);

setlinestyle(2,0,1);

rectangle(60,80,460,380);

setlinestyle(0,0,3);

rectangle(70,90,450,370);

setlinestyle(0,0,1);

line(450,330,250,330);

line(250,330,250,370);

line(330,330,330,370);

line(400,330,400,370);

line(250,350,450,350);

outtextxy(275,340,"Name");

outtextxy(255,360,"baiyang");

outtextxy(340,340,"Class");

outtextxy(335,360,"05010125");

outtextxy(410,340,"Number");

outtextxy(420,360,"18");

while(n!=0)

{

printf("please enter n:");

scanf ("%f",&n);

cleardevice ();

setbkcolor(LIGHTGREEN);

setcolor(1);

x=320,y=300;

setlinestyle(0,0,1);

rectangle(x-2*r*n,y-2*h*n,x,y);

rectangle(x-2*r*n,y-h*n,x,y);

setlinestyle(0,2,1);

rectangle(60,40,460,380);

setlinestyle(0,0,3);

rectangle(70,80,450,370);

setlinestyle(0,0,1);

line(450,330,250,330);

line(250,330,250,370);

line(330,330,330,370);

line(400,330,400,370);

line(250,350,450,350);

outtextxy(275,340,"Name");

outtextxy(255,360,"baiyang");

outtextxy(340,340,"Class");

outtextxy(335,360,"05010125");

outtextxy(410,340,"Number");

outtextxy(420,360,"18");

}

getch ();

closegraph ();

}

从你的报错翻翻信息可以看出,
把floatn=1; 发放成float n=1;也就是float 要和n 有一空格就可以了.
第二个错误也会随之解决.

但是改完了之后，结果运行不出来，致使为什么

你在图形模式中使用printf()和scanf()函数是很不合理的.

看 不懂

那应该怎样用

用别的函数代替.