使用Visual C++ 6.0 开发的史密斯圆图演示程序。类CSmithChart为圆图类，其方法包括确定圆图范围，计算归一化阻抗，放射系数，画X圆，画R圆等。-6.0 using Visual C development of the Smith Chart Demonstration Program. Class CSmithChart round of graphs, including a round map to determine the scope of the calculat