vb的代码比较少发布,做一个简单的3位数组合例子(123作百位,789作十位,456作个位)

Dim aaaa = {123,789,456}
        'Dim a0 = aaaa(0).ToString.ToArray,a1 = aaaa(1).ToString.ToArray,a2 = aaaa(2).ToString.ToArray
        Dim a = 0,b = 0,c = 0
        Dim e = "" '再次演示用判断替代循环技巧
        Do While a < 3
            'e += (a0(a) & a1(b) & a2(c)).ToString & (IIf(a = 2 And b = 2 And c = 2,""," "))'三目运算
            e += ((aaaa(0).ToString)(a) & (aaaa(1).ToString)(b) & (aaaa(2).ToString)(c)).ToString & (IIf(a = 2 And b = 2 And c = 2," "))
            If c < 2 Then
                c += 1
            Else
                c = 0
                b += 1
            End If
            If b = 3 Then
                c = 0
                b = 0
                a += 1
            End If
        Loop
        要得到的结果:174 175 176 184 185 186 194 195 196 274 275 276 284 285 286 294 295 296 374 375 376 384 385 386 394 395 396 
        如果要得到数字需要转换
        aaaa = e.Split(" ").Select(Function(aa) Int32.Parse(aa)).ToArray
        aaaa = e.Split(" ").Select(Function(aa,index) Int32.Parse(aa)).ToArray'index带序的其实和C#的写法就差aa=>不同
        以下是C#的写法
        var aaa = "123".Select(aa => int.Parse(aa.ToString()));
        aaa = "123".Select((aa,index) => int.Parse(aa.ToString()));