计算圆周率的小程序。界面有两个文本框，其中一个输入所要求的圆周率的位数，运行程序（按下确定键），另一个文本况钟会生成相应位数的圆周率。但最大位数为15位-calculated the ratio of the circumference of small procedures. Interface is two text box, one of the input requested by the median ratio of the circumference, operational procedures (identified by pressing keys), another version of the status bell will generate corresponding circumference of the median rate. But the greatest median 15