Question

VB.net编写一个控制台应用程序用来从键盘上输入两个数然后输出这两个数的和差积商

不要复制粘贴 接下来我要如何编写

Answer 1

应该定义为double或者single，string类好像不能进行运算。我简单说一下控制台的方法，你要一次性输入和差积商，首先声明两个变量用来储存两个数，然后用算法一次性输出结果就ok。

Sub Main()
Dim FN As Single
Dim SN As Single
Dim ResultNum As Single
Console.WriteLine("请输入第一个数") : FN = Console.ReadLine
Console.WriteLine("请输入第二个数") : SN = Console.ReadLine
ResultNum = FN + SN
Console.WriteLine("它们的和: " & ResultNum)
ResultNum = FN - SN
Console.WriteLine("它们的差: " & ResultNum)
ResultNum = FN * SN
Console.WriteLine("它们的积: " & ResultNum)
ResultNum = FN / SN
Console.WriteLine("它们的商: " & ResultNum)
Console.ReadLine()
End Sub

Answer 2

Module Module1
Sub Main()
Dim FN As Decimal
Dim SN As Decimal
Dim sum As Decimal
Dim dec1 As Decimal
Dim dec2 As Decimal
Dim dec3 As Decimal
Try
Console.WriteLine("请输入第一个数：")
FN = Decimal.Parse(Console.ReadLine)
Console.WriteLine("请输入第二个数：")
SN = Decimal.Parse(Console.ReadLine)
sum = FN + SN
dec1 = FN - SN
dec2 = FN * SN
dec3 = FN / SN
Console.WriteLine("和：{0},差:{1},积:{2},商:{3}", sum, dec1, dec2, dec3)
Catch ex As Exception
Console.WriteLine(ex.Message)
End Try
Console.WriteLine("按任意键退出")
Console.ReadKey()
End Sub
End Module