用Visual Basic编写一个程序，定义两个数组a(3,4)和 b(3,4）,数据类型为整型。利用过程分别实现两个数组初始数据输人、求和及结果输出等。

以下是使用 Visual Basic 编写的代码，用于定义两个3x4的整型数组a和b，利用过程分别实现它们的初始数据输入、求和和结果输出：

'定义数组a和b
Dim a(2, 3) As Integer
Dim b(2, 3) As Integer

'输入数组a的初始数据
Sub InputArrayA()
    For i As Integer = 0 To 2
        For j As Integer = 0 To 3
            Console.Write("a({0}, {1}) = ", i, j)
            a(i, j) = Integer.Parse(Console.ReadLine())
        Next
    Next
End Sub

'输入数组b的初始数据
Sub InputArrayB()
    For i As Integer = 0 To 2
        For j As Integer = 0 To 3
            Console.Write("b({0}, {1}) = ", i, j)
            b(i, j) = Integer.Parse(Console.ReadLine())
        Next
    Next
End Sub

'计算数组a和b的和
Function GetSum() As Integer(,)
    Dim sum(2, 3) As Integer
    For i As Integer = 0 To 2
        For j As Integer = 0 To 3
            sum(i, j) = a(i, j) + b(i, j)
        Next
    Next
    Return sum
End Function

'输出数组的内容
Sub PrintArray(arr As Integer(,))
    For i As Integer = 0 To 2
        For j As Integer = 0 To 3
            Console.Write("{0, 5}", arr(i, j))
        Next
        Console.WriteLine()
    Next
End Sub

'主程序
Sub Main()
    InputArrayA()
    InputArrayB()
    Dim sum = GetSum()
    Console.WriteLine("数组a和b的和为：")
    PrintArray(sum)
End Sub

运行后，控制台将提示输入数组a和b的初始数据，然后计算它们的和并输出。