画弧线

[c]代码库

#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;
}