movezeros.cpp

/*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.

Example:

Input: [0,1,0,3,12]
Output: [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.
*/

#include <iostream>
#include <vector>
using namespace std;
class moveZeros
{
public:
    void moveZeroes(vector<int>& nums) {
        int j =0;
        for(int i=0; i<nums.size(); i++){
            if (nums[i]!=0){
                nums[j++] = nums[i]; // increments j after the operation :)
            }
        }
        for (; j<nums.size(); j++){
            nums[j]=0;
        }
    }
};