我正在制作一个有序数组。元素在哪里。示例 1、2、3、4、5、6、77、89、100、201。我要求用户输入数组的大小。这很好，推送功能会将元素排序。但是当 arrayList 调整大小时，元素不再以有序的方式分配。
这是我的代码：
//-------------------------------------------------------
// Name: Array::Resize
// Description: Resize the array to a new size.
// Arguments: p_size. The new size of the Array.
//-------------------------------------------------------
void Resize(int p_size)//resizes the array to the size of p_size
{
cout << "Did i get this far ";
if(p_size < 0)//checks if new size is less than 0
{
cout << "ERROR! Size of an array can not be less than 0!" << endl;
}
else//else its ok to continue
{
Datatype* newArray = new Datatype[p_size];//creates a pointer newArray that points at a new array
if(newArray == 0)
{
return;
}
cout << "Did i get this far ";
int min;
if(p_size < size)//checks the if the new array is smaller than the old one
min = p_size;
else//else its going to be bigger
min = size;
cout << "Did i get this far ";
int index;
int temp = num_elements;//puts num_elements into a temporary variable called temp
num_elements = 0;//num_elements is set to 0
for(index = 0; index < min; index++)
{
newArray[index] = m_array[index];//places everything from the old array into the new array that will fit.
if(num_elements < temp)//if the num_elements is less than temp(the original num_elements)
{
num_elements++;//increment num_elements. This will keep incrementing to create the new num_elements based the number of elements cut off in the resize
}
}
size = p_size;//sets the old size to be equal to the new size
cout << "Did i get this far ";
if(m_array != 0)
cout << "\nI am just about to delete ";
//delete[] m_array;//deletes the old array
m_array = newArray;//makes m_array point at the new array
newArray = 0;//makes newArray a null pointer
}
}
//---------------------------------------------------------------------------------------
// Name: Push
// Description:
//---------------------------------------------------------------------------------------
void push(Datatype p_item)
{
if(num_elements == size)//checks if the array is full and needs to be resized
{
Resize(size + g_size);//calls the resize function
}
int pos = num_elements;
for(int x=0;x<num_elements;x++)
{
if(p_item < m_array[x])
{
pos=x;
}
}
//loops through the array from high to low moving all values to the right
//to make space for the passed in value until it gets to the right place
for(int index = num_elements; index >= pos; index--)
{
m_array[index] = m_array[index-1];//moves the values to the right
}
m_array[pos] = p_item;//the passed in value is positioned into its ordered position
num_elements++;
cout<< "Num Elements " << num_elements;
cout<< "Size " <<size;
}
//--------------------------------------------------------------------------------------------
// Name: template <class Datatype>
// Description:
//--------------------------------
template <class Datatype>
//--------------------------------------------------------------------------------------------
// Class: OrderedArray.
//--------------------------------------------------------------------------------------------
class OrderedArray
{
//--------------------------------------------------------------------------------------------
// Member Variables.
//--------------------------------------------------------------------------------------------
private:
Datatype* m_array;
int size;
int g_size;
int num_elements; //Counter for the number of elements in the Array.
//--------------------------------------------------------------------------------------------
// Name: Constructor.
// Description: Constructs the Array.
//--------------------------------------------------------------------------------------------
OrderedArray(int p_size)
{
//Sets the Array size.
m_array = new Datatype[p_size];
size = p_size;
grow_size = 1;
//How many elements are in the Array.
num_elements = 0;
}
任何帮助将非常感激。