一個簡單的一箭穿心程序 其實這個程序也不難，只要專心形線方程（1-ρ×cosθ)來繪圖就可以了。 作者：張躍華 學校：云南農業大學程序如下：#include<graphics.h>
#include<math.h>#define FNX(x1) (int)(x+(x1)*sl)
#define FNY(y1) (int)(MAXY-(y+(y1)*sl))
#define R(theta) 1-pow(cos(1*theta),1)int sl=50,MAXY;
float x1,y1,xs,ys,r,theta;
/*畫心*/
void draw(int x,int y)
{
for(theta=0;theta<2*3.14;theta+=0.01)
{r=R(theta);
x1=r*sin(theta);y1=r*cos(theta);
xs=FNX(x1);ys=FNY(y1);
if(theta==0)moveto(xs,ys);else lineto(xs,ys);
}
}/*畫箭頭*/
void jian()
{
line(205,235,200,240);
line(200,240,205,245);
line(200,240,214,240);
line(400,240,500,240);
line(485,235,480,240);
line(480,240,485,245);
line(490,235,485,240);
line(485,240,490,245);
line(495,235,490,240);
line(490,240,495,245);
line(500,235,495,240);
line(495,240,500,245);
line(505,235,500,240);
line(500,240,505,245);
line(485,235,505,235);
line(485,245,505,245);
}
/*主程序*/
main()
{int driver=DETECT,mode;
initgraph(&driver,&mode,"");
setbkcolor(1);
setcolor(4);
MAXY=getmaxy();
draw(280,280);/*左心*/
draw(370,280);/*右心*/
jian();
getch();
closegraph();
}
