如何用C ++ Builder制作一个变量函数的图形。 [英] How to Make graph of a function of one variable with C++ Builder.

问题描述

嘿朋友们，我必须用C ++ Builder绘制一个变量函数的图形。但是没有İdea要做:(有人可以帮我们输入一个变量方程而不是图表方程式...感谢所有...

解决方案

为了代表一个函数你可以：

1. 在 X 感兴趣的范围的（多个）点处对函数进行抽样，获得 {x，y = f（x）} 对的数组。
2. 使用这样的数组绘制函数图（作为第一个适当的你可以直接绘制连接点的线。）

点（1）非常简单。

点（2）要求：

• 操纵 {x，y} 值以适应屏幕绘图矩形（即翻译和点的比例）
• 使用 C ++ 构建器知道绘图原语（关于参数有很多教程，你可能会看到只使用< a href =http://www.google.co.uk/#rlz=1C2CHFX_itIT503IT534&sclient=psy-ab&q=drawing+with+c%2B%2 B +助洗剂&安培; OQ =绘图+与+ C％2B％2B +助洗剂&安培; gs_l = serp.3..0i22i30.3160.3160.0.3730.1.1.0.0.0.0.149.149.0j1.1.0 ... 0.0.0 .. 1c.1.15.psy-ab.yTVoUJ_iKi8& pbx = 1& bav = on.2，or.r_qf。& fp = af586b6f14c6622b& biw = 1090& bih = 745> Google [ ^ ]）。

Hey Friends , I must graph of a function of one variable with C++ Builder. But No İdea to make :( someone who can help we can input One variable equation than graph the equation ...Thanks to for all...

解决方案

In order to represent a function you may:

1. Sample the function at (many) points of the X range of interest, obtaining an array of {x,y=f(x)} pairs.
2. Draw the function graph using such array (as first appropximation you may draw straight lines connecting the points).

Point (1) is pretty straightforward.
Point (2) requires:

• manipulating the {x,y} values in order to fit into the screen drawing rectangle (that is translation and scale of the points)
• Knowing ho to drawing primitives using C++ builder (there are many tutorials on the argument, as you may see just using Google[^]).

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