说明：  描述了vs.net的一些程序设计题目如1.设计程序完成1 2 + 2 2 + 3 2 +…+10 2 的累加值。结果送至变量Sum.。 2.设计并完成一个函数 Calc( ByVal R1 As Decimal , ByVal R2 As Decimal ),参数R1 是外圆的半径，参数 R2时内圆半径（两圆同心），返回值是圆环的面积值。 3.设计并完成一个函数 Getmax( ByVal x1 As Decimal , ByVal x2 As Decimal ),函数的返回值是一个字符串，其内容是两个参数较大值的变量名（x1或x2）。
(Described vs.net programming topics as a design program to complete 1 2+ 2 2+ 3 2+ ...+10 2 cumulative value-added. Results sent to the variable Sum. Design and completion of a function Calc (ByVal R1 As Decimal, ByVal R2 As Decimal), the parameters R1 is the radius of the outer circle, the the parameter R2 radius (two circles concentric), the return value is the value of the area of ​ ​ the ring. Design and completion of a function Getmax (ByVal x1 As Decimal, ByVal x2 As Decimal), the function' s return value is a string, the contents of the variable name of the greater value of the two parameters (x1 or x2).)