在书本上看到例文
制作心形图案,代码如下:
```#include<graphics.h>
#include<math.h>
#define PI 3.1415926
void main()
{
int x,y,y1,r=50,r1;
double a;
int gdriver=DETECT,gmode,color;
initgraph(&gdriver,&gmode,"c:\\tc\\bgi");
cleardevice();
setcolor(RED);
setbkcolor(WHITE);
y1=240-r;
for(a=0;a<2*PI;a+=PI/18)
{
x=r*cos(a)+320;
y=r*sin(a)+240;
r1=sqrt((x-320)*(x-320)+(y-y1)*(y-y1));
circle(x,y,r1);
}
getch();
closegraph();
}
录入后编译一直出错,这是什么原因?
![img](https://img-mid.csdnimg.cn/release/static/image/mid/ask/526830863146187.png "#left")