Remove Element

Remove Element

Given an array and a value, remove all instances of that value in place and return the new length.

The order of elements can be changed. It doesn't matter what you leave beyond the new length.

 

解题方法：

采用双指针的思想。一个指针用来遍历数组，另个一个指针用于指示当前合法数据的位置。

 

Code：

class Solution {
public:
    int removeElement(int A[], int n, int elem) {
        int pElem=0;
        for(int i=0;i<n;i++)
            if(elem!=A[i])
            {
                A[pElem++]=A[i];
            }
        return pElem;
    }
};