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ellipse

By Adam Peterson,2014-08-27 18:39
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ellipse

函数名: ellipse

     : 画一椭圆

     : #include <graphics.h>

     void far ellipse(int x, int y, int stangle, int endangle, int

    xradius, int yradius);

    程序例:

    #include <graphics.h>

    #include <stdlib.h>

    #include <stdio.h>

    #include <conio.h>

    int main(void)

    {

     /* request auto detection */

     int gdriver = DETECT, gmode, errorcode;

     int midx, midy;

     int stangle = 0, endangle = 360;

     int xradius = 100, yradius = 50;

     /* initialize graphics, local variables */

     initgraph(&gdriver, &gmode, "");

     /* read result of initialization */

     errorcode = graphresult();

     if (errorcode != grOk)

     /* an error occurred */

     {

     printf("Graphics error: %s\n",

     grapherrormsg(errorcode));

     printf("Press any key to halt:");

     getch();

     exit(1);

     /* terminate with an error code */

     }

     midx = getmaxx() / 2;

     midy = getmaxy() / 2;

     setcolor(getmaxcolor());

     /* draw ellipse */

     ellipse(midx, midy, stangle, endangle,

     xradius, yradius);

     /* clean up */

     getch();

     closegraph();

     return 0;

    }

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