//螺旋六边形
#include <graphics.h>
#include <math.h>
void polygonc();
void main()
{
    int i,r,n,x=320,y=240;
    int gdriver=9,gmode=2;
    float theta,alfa;
    n=30;
    theta=6.0;
    initgraph(&gdriver,&gmode,"c:\\tc");
    cleardevice();
    setbkcolor(MAGENTA);
    setcolor(WHITE);
    r=160;
    alfa=60.0;
    for(i=0;i<n;i++)
    {
        polygonc(x,y,r,6,alfa);
        r=(int)(0.866*r/cos((30.0-theta)*0.0174533));
        alfa=alfa+theta;
    }
    getch();
    closegraph();
}
void polygonc(x0,y0,r,n,af)
int x0,y0,n,r;
float af;
{
    int x,y,xs,ys,i;
    float dtheta,theta;
    if(n<3)
        return;
    dtheta=6.28318/n;
    theta=af*0.0174533;
    xs=x0+r*cos(theta);
    ys=y0+r*sin(theta);
    moveto(xs,ys);
    for(i=1;i<n;i++)
    {
        theta=theta+dtheta;
        x=x0+r*cos(theta);
        y=y0+r*sin(theta);
        lineto(x,y);
    }
    lineto(xs,ys);
}

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为什么在easyx下定义一个新的函数总是有function does not take 2 parameters诸如此类的提示