C语言实现求数组的子数组之和的最大值并求出最大子数组位置

题目：输入一个有N个元素的一位数组（N通过输入确定），这个数组当然有很多子数组，求最大的子数组之和并求出最大子数组的位置。

以下是一个我写的程序：

#include 
#include
#include




int InputArray(int* &a,int ArrayLength)
{
    printf("Please Input the Array Members:\n"); 
    for(int i=0; i< ArrayLength; i++)
      scanf("%d",&a[i]);
}




int MaxSum(int a[], int n, int &StartFlag, int &EndFlag)
{
int nStart,nAll;
nStart = a[n-1];
nAll = a[n-1]; //Record the final MaxSum of SubArray 
for(int j=n-2; j>=0; j--)
{
     if( EndFlag >= StartFlag )
 { if(nStart < 0) 
{
nStart = 0;
EndFlag = j;
}
nStart += a[j];
if( nStart > nAll)
{
nAll = nStart;
StartFlag = j;
}
if( EndFlag < StartFlag)
   EndFlag = StartFlag;
      }
}
return nAll;
}


int main()
{
    int Choose,Flag=1;
    while(Flag)
{
      printf("Please choose your operation:  \n");
      printf("Excise Input 1, Exit input 2\n");
      scanf("%d",&Choose);
      if(Choose==1)
      {
         int *a, ArrayLength;
         printf("Please Input the Array Size:\n");  
         scanf("%d",&ArrayLength);
         a = (int*)malloc(ArrayLength*sizeof(int));
    InputArray(a,ArrayLength); 
         int StartFlag=0;
    int EndFlag = ArrayLength-1;
    printf("The MaxSum sub of Array is %d:\n",MaxSum(a, ArrayLength, StartFlag, EndFlag) );
    printf("The Max SubArray is From %d to %d.\n",StartFlag,EndFlag);
    getch();
    free(a);
       }
       if(Choose==2) Flag=0;
    }    
return 0;
}