643. Maximum Average Subarray I

class Solution {
public:
    double findMaxAverage(vector<int>& nums, int k) {
      
        double maxi=INT_MIN;
        double sum=0.00;
        int j=0;
        
        for(int i=0; i<nums.size(); i++)
        {
           sum+=nums[i];
           if(i-j+1==k)
           {
               maxi=max(sum,maxi);
               sum-=nums[j];
               j++;
           }   
        
        }
         maxi/=k;
       
    
     return maxi;   
    }
};