drawcirc.c

来自「The art and science of c_source code!」· C语言 代码 · 共 36 行

/*
 * File: drawcirc.c
 * ----------------
 * Program to draw a complete circle.
 */

#include <stdio.h>
#include "genlib.h"
#include "graphics.h"

/* Function prototypes */

void DrawCenteredCircle(double x, double y, double r);

/* Main program */

main()
{
    InitGraphics();
    DrawCenteredCircle(1.0, 1.0, 0.5);
}

/*
 * Function: DrawCenteredCircle
 * Usage: DrawCenteredCircle(x, y, r);
 * -----------------------------------
 * This function draws a circle of radius r with its
 * center at (x, y).
 */

void DrawCenteredCircle(double x, double y, double r)
{
    MovePen(x + r, y);
    DrawArc(r, 0, 360);
}