Task 3

#include <iostream>
#include <time.h>
using namespace std;

void main()
{
    int arr[200];
    int sum = 0;
    srand((unsigned)time(NULL));
    cout << "生成的数组为："<< endl;
    for (int i = 0;i < 200; i++)
    {
        arr[i] = rand()%201-100;//生成一个随机数组
        cout << arr[i] << "   ";
        if (arr[i] >= 0)//找出所有非负数将其相加
        {
            sum = sum + arr[i];
            cout << arr[i];
        }
    }    
    cout << endl;
    cout << "该数组的子数组和的最大值为:" << sum << endl;
}