连续子数组的最大和

定义一个MaxSum存储最大值，定义一个currentSum存储当前最大值。当currentSum大于MaxSum时更新MaxSum，当currentSum<0时，则将currentSum记0，重新记录

 1 #include<iostream>
 2 #include<vector>
 3 using namespace std;
 4 
 5 int MaxSubArraySum(const vector<int>& data)
 6 {
 7     if (data.size() == 0)
 8         return 0;
 9     int MaxSum = 0;
10     int currentSum = 0;
11     for (int i = 0; i < data.size(); i++)
12     {
13         currentSum += data[i];
14         if (currentSum > MaxSum)
15             MaxSum = currentSum;
16         else if (currentSum < 0)
17             currentSum = 0;
18     }
19     return MaxSum;
20 }
21 
22 int main()
23 {
24     vector<int> data{ 1,-2,3,10,-4,7,2,-5 };
25     cout << MaxSubArraySum(data) << endl;
26     return 0;
27 }