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arc

By Brittany Anderson,2014-08-27 18:39
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arc

函数名: arc

     : 画一弧线

     : #include <graphics.h>

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

    radius);

    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 = 45, endangle = 135;

     int radius = 100;

     /* initialize graphics and local variables */

     initgraph(&gdriver, &gmode, "");

     /* read result of initialization */

     errorcode = graphresult(); /* an error occurred */

     if (errorcode != grOk)

     {

     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 arc */

     arc(midx, midy, stangle, endangle, radius);

     /* clean up */

     getch();

     closegraph();

     return 0;

    }

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