Leetcode之Move Zeroes 问题

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问题描述:

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.

Note:

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

示例:

For example, given nums = [0, 1, 0, 3, 12], after calling your function,nums should be[1, 3, 12, 0, 0].

问题来源:Move Zeroes (详细地址:https://leetcode.com/problems/move-zeroes/description/)

思路分析:这道题的题目意思很简单,就是把非0数字往前移,0全部移到后面去。那么我们用一个计数器count来记录不等于0的数字的个数,利用指针i遍历数组时,如果当前的这个数不等于0,那我们就把i指向的数赋值给计数器count指向的位置,把i指向的数赋值为0(必须是i在count前面才能这么赋0),然后count++,直到遍历完就OK了。

代码: