第七周项目一图形用户界面（GUI）应用成语开发初体验

问题及代码：

/*

*Copyright (c) 2015,烟台大学计算机学院

*All rights reserved.

*文件名称：test.cop

*作者：

*完成日期：2015年4月26日

*版本号：v1.0

*

*问题描述：

*输入描述：

*输出描述

<span style="font-size:24px;">开发工具：vs2013</span>

<span style="font-size:24px;"><img src="http://img.blog.csdn.net/20150426102007854?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvaG91eGluaGFuZzEyMw==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="" />
</span>

<span style="font-size:10px;">新建（sanjiao.h）</span>

<span style="font-size:10px;">class Triangal
{
private:
<span style="white-space:pre">	</span>double a, b, c;
public:
<span style="white-space:pre">	</span>Triangal(){ a = 0; b = 0; c = 0; }
<span style="white-space:pre">	</span>Triangal(double A, double B, double C){ a = A; b = B; c = C; }
<span style="white-space:pre">	</span>double mianji(void);
};
</span>

<span style="font-size:10px;">新建（sanjiao.cpp)</span>

<span style="font-size:10px;">#include "stdafx.h"
#include "sanjiao.h"
#include "Cmath"
double Triangal::mianji()
{
<span style="white-space:pre">	</span>double m = (a + b + c) / 2;
<span style="white-space:pre">	</span>return sqrt(m*(m - a)*(m - b)*(m - c));
}
</span>

<span style="font-size:10px;">按钮的实现：</span>

<span style="font-size:10px;">void CTriangalDlg::OnBnClickedButton1()
{
<span style="white-space:pre">	</span>// TODO:  在此添加控件通知处理程序代码
<span style="white-space:pre">	</span>UpdateData();
<span style="white-space:pre">	</span>Triangal t1(m_a,m_b,m_c);
<span style="white-space:pre">	</span>m_area = t1.mianji();
<span style="white-space:pre">	</span>UpdateData(false);

}
</span>

<span style="font-size:10px;">运行结果：</span>

<span style="font-size:10px;"><img src="http://img.blog.csdn.net/20150426102204614?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvaG91eGluaGFuZzEyMw==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="" />
</span>

<span style="font-size:10px;">学习心得：</span>

<span style="font-size:10px;">MFC应用程序很强大，学习中虽然遇到了一些困难，但是我对他越来越感兴趣了。</span>