large comparison in C

#include<stdio.h>
#include<conio.h>
#include<stdlib.h>
#include<time.h> 
bool CompareThan(char A[], char B[], char nA, char nB)
{
	if (A[0] * B[0] < 0)
	{
		if (A[0]>0)
		{
			return true;
		}
		return false;
	}
	if (nA > nB)
	{
		if (A[0] > 0)
		{
			return true;
		}
		return false;
	}
	if (nA < nB)
	{
		if (A[0] < 0)
		{
			return true;
		}
		return false;
	}
	if (nA == nB)
	{
		char k = 0;
		if (B[0] < 0)
		{
			if (A[0] > B[0])
			{
				return true;
			}
			else if (A[0] < B[0])
			{
				return false;

			}
			else 
			{
				for (k = 1; k < nA; k++)
				{
					if (A[k]<B[k])
					{
						return true;
					}
					else if (A[k] > B[k])
					{
						return false;
					}
				}
			}
			return false;
		}
		else
		{
			for (k = 0; k < nA; k++)
			{
				if (A[k]>B[k])
				{
					return true;
				}
				else if (A[k] < B[k])
				{
					return false;
				}
			}
		}

	}
	return false;
}
void Swap(char **&Arr, char *ArrLengthOfNumber, char i, char j)
{
	char *C;
	C = Arr[i];
	Arr[i] = Arr[j];
	Arr[j] = C;

	char c;
	c = ArrLengthOfNumber[i];
	ArrLengthOfNumber[i] = ArrLengthOfNumber[j];
	ArrLengthOfNumber[j] = c;
}
void BubbleSort(char **&Arr, unsigned int ElementNumber, char *&ArrLengthOfNumber, int &CountCompare)
{
	unsigned int i, j;
	for (i = 0; i < ElementNumber - 1; i++)
	{
		for (j = 0; j < ElementNumber - i - 1; j++)
		{
			if (CompareThan(Arr[j], Arr[j + 1], ArrLengthOfNumber[j], ArrLengthOfNumber[j + 1]))
			{
				Swap(Arr, ArrLengthOfNumber, j, j + 1);
			}
		}
	}
}//Hàm thứ 2
void GetArrOfNumber(char **&Arr, unsigned int ElementNumber, char *&ArrLengthOfNumber)
{
	unsigned int i;
	char j;
	Arr = (char **)malloc(ElementNumber*sizeof(char  *)); //Cấp phát bộ nhớ
	if (Arr == NULL)
	{
		printf("Error!!! NOT ENOGHT MEMORY!!!");
		exit(1);
	}
	ArrLengthOfNumber = (char *)malloc(ElementNumber*sizeof(char));//Cấp phát bộ nhớ
	for (i = 0; i < ElementNumber; i++)
	{

		ArrLengthOfNumber[i] = 15 + rand() % 5;
		Arr[i] = (char *)malloc(ArrLengthOfNumber[i] * sizeof(char));
		do
		{
			Arr[i][0] =  rand()%9 - rand() % 9;// mới sữa
		} while (Arr[i][0] == 0);
		if (Arr[i] == NULL)
		{
			printf("Error!!! NOT ENOGHT MEMORY!!!");
			exit(1);
		}
		for ((char)j = 1; j < ArrLengthOfNumber[i]; j++)
		{
			Arr[i][j] = rand() % 9;
		}
	}

}
void main()
{
	int dem = 0;
	srand((unsigned)time(NULL));
	unsigned int i;
	unsigned int j;
	unsigned int ElementNumber = 20;
	char **Arr = NULL;
	char *ArrLengthOfNumber = NULL;
	//////////////////////////////////////////
	GetArrOfNumber(Arr, ElementNumber, ArrLengthOfNumber); //Tạo dãy số
	/////////////////////////////////////////
	BubbleSort(Arr, ElementNumber, ArrLengthOfNumber, dem); //Sort
	/////////////////////////////////////////
	printf("After Run Bubble Sort:\n");
	for (i = 0; i < ElementNumber; i++) //In ra kết quả
	{
		for (j = 0; j < ArrLengthOfNumber[i]; j++)
		{
			printf("%d", Arr[i][j]);

		}
		printf("\n");
	}
	//////////////////////////////////////// Giải phóng :D
	for (i = 0; i < ElementNumber; i++)
	{
		free(Arr[i]);
	}
	free(Arr);
	printf("\nFinish !!!");
	_getch();
}