从C ++到VB.NET的转换：表达式内的赋值

Question

Am converting some C++ code to VB.NET and need to convert assignments within expressions. Below are some C++ lines of code for which it's not clear what the converted results would be:

    i2 = 1 + (i1 = i + i)
    i4 = 1 + (i3 = n - i1)
    wr = (wtemp = wr) * wpr - wi * wpi + wr
    data(0) = (h1r = data(0)) + data(1)
    data(0) = c1 * ((h1r = data(0)) + data(1))

Would the first line translate to:

    If i2 = 1 Then i1 = i + i

?

Answer 1

Hans gave you the procedure - but just in case there's still any doubt about how to do this, your final result should be:

i1 = i + i
i2 = 1 + i1
i3 = n - i1
i4 = 1 + i3
wtemp = wr
wr = wtemp * wpr - wi * wpi + wr
h1r = data(0)
data(0) = h1r + data(1)
h1r = data(0)
data(0) = c1 * (h1r + data(1))

Answer 2

The code is already converted to VB.NET!

For example if you look at the following VB.NET code

    Dim i2 As Int16
    Dim i1 As Int16
    Dim i As Int16
    Dim data(0 To 1)

    i = 1
    i1 = 1
    i2 = 0

    i2 = 1 + (i1 = i + i)   'Same as your C++ code

    MsgBox(i2)

It will return 1. The code translates to i2 = 1 + (if i1= i+i)