题目描述：
Given an array nums, write a function to move all 0's to the end of it while maintaining the relative order of the non-zero
elements.
For example, given nums = [0, 1, 0, 3, 12], after calling your function, nums should be [1, 3, 12, 0, 0].
Note:
You must do this in-place without making a copy of the array.
Minimize the total number of operations.
将数组中所有的0放在最后。
思路：
Two Pointer 解法。
两个索引：z和nZ，分别表示等于0和不等于0的位置，初始化为0。
扫一遍数组（nZ递增），遇到不等于0的，nums[nZ]与nums[z]互换，z++。
实现代码：public class Solution {
public void MoveZeroes(int[] nums) {
var nZ = 0;
var z = 0;
while(nZ < nums.Length)
{
if(nums[nZ] != 0)
{
var t = nums[z];
nums[z] = nums[nZ];
nums[nZ] = t;
z++;
}
nZ++;
}
}
}