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2Â¥2011-06-29 15:02:31
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dubo(½ð±Ò+1): »¶Ó­³£À´³ÌÐòÓïÑÔ°æÌÖÂÛ 2011-06-29 21:40:55
ÊØÃÅÀÏÈË(½ð±Ò+30): ºÜÓÐÓà ллÁË 2011-07-02 10:39:55
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#include "graphics.h"
void main()
{
    int driver=9, mode=2;
    /*int x[20], y[20];*/
    float t;
    int a0, a1, a2, a3, b0, b1, b2, b3, x1, y1, i, j;
    /*¿ØÖƵã×ø±ê£¬20¸ö(ǰ4ÐÐ)£¬×îºó¼¸¸öµãÓëǰ¼¸¸öµãÖØºÏ£¬ÊÇΪÁËʹ»­³öµÄͼÐαպÏ*/
    static int p[][2] =
    {
        260, 100, 260, 20, 200, 20, 180, 60, 180, 60,
                80,  60,  80, 90,  195, 80, 200, 140, 120, 200,
                120, 340, 240, 360, 430, 360, 480, 180, 520, 140,
                520, 140, 520, 140, 340, 160, 300, 200, 240, 160,
                260, 100, 260, 20, 200, 20
    };

    initgraph(&driver, &mode, "";
    setlinestyle(0, 0, 3);

    /*Öð¸ö´¦Àí¿ØÖÆµã*/
    for(i = 0; i < 20; i++)
    {
        a0 = ( p[0] + 4 * p[i+1][0] + p[i+2][0] ) / 6;
        a1 = ( p[i+2][0] - p[0] ) /2;
        a2 = ( p[0] - 2 * p[i+1][0] + p[i+2][0] ) / 2;
        a3 =-( p[0] - 3 * p[i+1][0] + 3 * p[i+2][0] - p[i+3][0] ) / 6;
        b0 = ( p[1] + 4 * p[i+1][1] + p[i+2][1] ) / 6;
        b1 = ( p[i+2][1] - p[1] ) / 2;
        b2 = ( p[1] - 2 * p[i+1][1] + p[i+2][1] ) / 2;
        b3 =-( p[1] - 3 * p[i+1][1] + 3 * p[i+2][1] - p[i+3][1] ) / 6;

        /*Éú³ÉÀëÉ¢µã*/
        for(j = 0; j < 30; j++)
        {
            t = j / 30.0;
            x1 = a0 + a1 * t + a2 * t * t + a3 * t * t * t;
            y1 = b0 + b1 * t + b2 * t * t + b3 * t * t * t;
            if(i==0 && j==0)
                moveto(x1, y1);
            else
                lineto(x1, y1);
        }
    }
    circle(220, 60, 8);
    /*setcolor(12);*/
    setlinestyle(1, 0, 1);
    moveto(p[0][0], p[0][1]);

    /*»­°üÏß*/
    for(i = 1; i < 23; i++)
    {
        lineto(p[0], p[1]);
    }
    /*lineto(p[0][0], p[0][1]);*/
    getch();
    closegraph();
}
3Â¥2011-06-29 19:45:44
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