将一个数组的零元素放在数组的最后

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:

1. You must do this in-place without making a copy of the array.
2. Minimize the total number of operations.

将一个数组的零元素放在数组的最后

原文：http://www.cnblogs.com/yangscode/p/5018574.html