课堂作业 最大连续子数组之和

#include <stdio.h>

int Find_ChileArray(int A[], int low, int mid, int high)

{

    int left_sum = -0xff;

    int sum = 0;

    for (int i = mid; i >= low; i --)

    {

        sum += A[i];

        if (sum >left_sum)

        {

            left_sum = sum;

        }

    }

    int right_sum = -0xff;

    sum = 0;

    for (int j = mid + 1; j <= high; j ++)

    {

        sum += A[j];

        if (sum > right_sum)

        {

            right_sum = sum;

        }

    }

    return left_sum + right_sum;

}

 

int Find_PartMaxSubArray(int A[], int low, int high)

{

    int left_sum, right_sum, cross_sum;

    if (high == low)

    {

        return A[low];

    }

    else

    {

        int mid = (low + high) / 2;

        left_sum = Find_PartMaxSubArray(A, low, mid);

        right_sum = Find_PartMaxSubArray(A, mid + 1, high);

        cross_sum = Find_ChileArray(A, low, mid, high);

        if (left_sum >= right_sum && left_sum >= cross_sum)

        {

            return left_sum;

        }

        else if (right_sum >= left_sum && right_sum >= cross_sum)

        {

            return right_sum;

        }

        else

        {

            return cross_sum;

        }

    }

}

int main()

{

    int A[100];

    int n;

    printf("请输入数组中数的个数:");

    scanf("%d",&n);

    printf("请输入数组中的数：");

    for (int i = 0; i < n; i ++)

    {

        scanf("%d",&A[i]);

    }

    printf("最大子序列的和为：%d\n",Find_PartMaxSubArray(A, 0, n - 1));

    return 0;

}