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分享请问VC中画椭圆的函数 Ellipse(a, b, c, d)的是个参数个是什么含义？在线等待指教。
请问VC中画椭圆的函数 Ellipse(a, b, c, d)的是个参数个是什么含义？
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dege 2003-09-26
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谢谢各位的指教 我不知道是什么回事 我装了两次MSDN 都没成功，我先是装单位给我的MSDN没有成功，提示有文件找不到，然后我又到网上下载了一个，但还是不行，同样提示找不到文件，我都郁闷死了，我还有没有办法装上MSDN
chenxianbing9822 2003-09-26
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a是矩形左上角x坐标，b是矩形左上角y坐标,c是矩形右下角x坐标，d是矩形右下角y坐标.
Viconia 2003-09-26
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我直接把MSDN上的内容帖上来了，呵呵，自己学着看看吧
smch 2003-09-26
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呵呵，象这种问题建议还是查MSDN吧，善于使用MSDN可以大大提高你的能力。
Viconia 2003-09-26
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BOOL Ellipse( int x1, int y1, int x2, int y2 );
BOOL Ellipse( LPCRECT lpRect );
Return Value
Nonzero if the function is successful; otherwise 0.
Parameters
x1
Specifies the logical x-coordinate of the upper-left corner of the ellipse’s bounding rectangle.
y1
Specifies the logical y-coordinate of the upper-left corner of the ellipse’s bounding rectangle.
x2
Specifies the logical x-coordinate of the lower-right corner of the ellipse’s bounding rectangle.
y2
Specifies the logical y-coordinate of the lower-right corner of the ellipse’s bounding rectangle.
lpRect
Specifies the ellipse’s bounding rectangle. You can also pass a CRect object for this parameter.
Remarks
Draws an ellipse. The center of the ellipse is the center of the bounding rectangle specified by x1, y1, x2, and y2, or lpRect. The ellipse is drawn with the current pen, and its interior is filled with the current brush.
The figure drawn by this function extends up to, but does not include, the right and bottom coordinates. This means that the height of the figure is y2 – y1 and the width of the figure is x2 – x1.
If either the width or the height of the bounding rectangle is 0, no ellipse is drawn.
BOOL Ellipse( LPCRECT lpRect );
Return Value
Nonzero if the function is successful; otherwise 0.
Parameters
x1
Specifies the logical x-coordinate of the upper-left corner of the ellipse’s bounding rectangle.
y1
Specifies the logical y-coordinate of the upper-left corner of the ellipse’s bounding rectangle.
x2
Specifies the logical x-coordinate of the lower-right corner of the ellipse’s bounding rectangle.
y2
Specifies the logical y-coordinate of the lower-right corner of the ellipse’s bounding rectangle.
lpRect
Specifies the ellipse’s bounding rectangle. You can also pass a CRect object for this parameter.
Remarks
Draws an ellipse. The center of the ellipse is the center of the bounding rectangle specified by x1, y1, x2, and y2, or lpRect. The ellipse is drawn with the current pen, and its interior is filled with the current brush.
The figure drawn by this function extends up to, but does not include, the right and bottom coordinates. This means that the height of the figure is y2 – y1 and the width of the figure is x2 – x1.
If either the width or the height of the bounding rectangle is 0, no ellipse is drawn.
afantict 2003-09-26
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是包围这个椭圆的矩形的左上角和右下角的坐标
