C# 获取数组的子集

private static void PrintSubItems(int[] source)

{

int i = 1;

int total = int.Parse(Math.Pow(2, source.Length).ToString());

int cur;

int cnt = 1;

while (i < total)

{

Console.Write("Possibility " + cnt + ": ");

cur = i;

int idx = 0;

while (cur != 0)

{

if ((cur & 1)!=0)

Console.Write(source[idx] + ", ");

cur >>= 1;

idx++;

}

cnt++;

i++;

Console.Write("\r\n");

}

}