Remove Duplicates from Sorted Array 删除数组中的重复元素

class Solution {
public:
    int removeDuplicates(int A[], int n) {
        // IMPORTANT: Please reset any member data you declared, as
        // the same Solution instance will be reused for each test case.
        if(n<=1) return n;
        int index=0;
        for(int i=1;i<n;i++)
        {
            if(A[index]!=A[i])
              A[++index]=A[i];
        }
        return index+1;
    }
};