Merge sort

#include <cstdlib>
#include <cmath>
#include <ctime>
#include <iostream>

using namespace std;
///////////////////    ProtoTypes     ////////////////////////////////
void BubbleSort(int Arr1[]);
void shellSort(int Arr2[]);
void selectionSort(int Arr3[]);
void merge_sort(int Arr1[],int Arr2[], int Arr3[]);
//////////////////    Main Driver    //////////////////////////////
int main()
{
	cout<<"THIS IS THE MAIN ARRAYOF 150:"<<endl;
int Arr[150], Arr1[50], Arr2[50], Arr3[50], Tmp1[100], Tmp2[150]; 
srand ((unsigned) time(NULL)); 
for (int i=0; i<150 ;i++)
{
    Arr[i]=rand()%1000;
    cout<< " "<<Arr[i];
}

//////////////////////////////// BUBBLE SORT////////////////////////////////
cout <<endl<<endl<<endl;
cout<<" 1 A...THIS IS THE FIRST UNSORTED 50 ELEMENTS OF THE ARRY "<<endl; 
     for(int i=0; i < 49; i++)// this is 
         {
           Arr1[i] = Arr[i];
           cout <<" "<<Arr1[i];
         }
BubbleSort(Arr1);
cout <<endl<<endl<<" 1 B...THIS THE THE BUBBLE SORTED ELEMENTS OF ARRAY 1:"<<endl;
		for(int i=0;i<49;i++)
		{ cout<<" "<<Arr1[i];	}// this format for paper space
///////////////////////////////SHELL SORT////////////////////////
cout<<endl<<endl<<endl<<endl<<"2 A...THIS IS THE SECOND 50 ELEMENTS OF THE ARRAY "<<endl<<endl; 
          for(int i=50; i < 99; i++)
         {
           Arr2[i-50] =Arr[i]; 
           cout <<" "<<Arr2[i];
         } 
cout<<endl<<endl<<"2 B...THIS THE THE SHELL SORTED ARRAY OF 50 ELEMENTS"<< endl; 
shellSort(Arr2);
		for(int i=0; i<50-1;i++)
		{	cout<<" "<<Arr2[i];		}
/////////////////            Selction Sort          /////////////////////////////// 
cout<<endl<<endl<<endl<<endl<<" 3 A ... THIS IS THE THIRD 50 ELEMENTS OF THE ARRAY "<<endl; 
          for(int i=100; i < 149-1; i++)
         {
           Arr3[i-100] =Arr[i] ;
           cout <<" "<<Arr3[i];
         }

cout<<endl<<endl<<"3 B...THIS THE THE SELECTION SORTED ARRAY OF 50 ELEMENTS"<< endl;
 selectionSort(Arr3);
	  for(int i=0; i<50-1;i++)
		{  
			cout<<" "<<Arr3[i];   
	    }

////////////////            Merge Sort          ///////////////////////////////
cout<<endl<<endl<<endl<<endl<<" 4 A ... THIS IS THE MERGE OF ALL ELEMENTS OF EACH ARRAY "<<endl; 
merge_sort(Arr1, Arr2, Arr3);
		for(int i =0; i<100-1; i++)
		{
			cout<<" "<< Arr3[i];
		}

 system("PAUSE");
 return EXIT_SUCCESS;
}

/////////////////////    FREEE FUNCTIONS    /////////////////////////////////////
void BubbleSort(int Arr1[])
{
	int tmp;
     for(int  i=0;i<49-1;i++)
    		{
    		 for(int  x=0; x<49-1; x++)
    			 {
    			  if(Arr1[x] > Arr1[x+1])
    				{
    				 tmp = Arr1[x];
    				 Arr1[x] = Arr1[x+1];
    				 Arr1[x+1] = tmp;
    		}    }   }
}

void shellSort(int Arr2[])
{
	int i,j, hCnt,h,k ,increments[20];
	for(h=1, i=0;h<49; i++)
	{
		increments[i]=h;
		h=3*h+1;
	}
		for(i--;i>=0;i--)
			{
				h=increments[i];
				for(hCnt = h; hCnt<2*h;hCnt++)
					{
						for(j= hCnt; j<49;)
							{
								int tmp = Arr2[j];
								k=j;
								while(k-h>=0 && tmp<Arr2[k-h])
									{
										Arr2[k] = Arr2[k-h];
										k-=h;
									}
									Arr2[k]=tmp;
									j+=h;
	}}}}	

void selectionSort(int Arr3[])
	{
	   int tmp;
	   int min;
	   for(int  i=0;i<50;i++)
	   {
	     min = i;
         for(int  x=i; x<50; x++)
		   {
			if(Arr3[x] < Arr3[min])
			 {
				min = x;
			 }
		   }
		  tmp = Arr3[i];
		  Arr3[i] = Arr3[min];
		  Arr3[min] = tmp;
		}
    }

void merge_sort(int Arr1[],int Arr2[], int Arr3[])
{
	int Tmp1[100];// this is s tem []
	int Tmp2[150];// ditto
	int i;
     
     while((Arr1 < 50) && (Arr2 < 50))
     {
		  if (Arr1[i] < Arr2[i])
          {
             Tmp1[i] = Arr1[i];
             Arr1[i]++;    //increase the index	
			 cout<<" "<<Arr1;
          }
		  else
		  {
	  		 Tmp1[i] = Arr2[i];
			 Arr2[i]++;      //increase the index
			 cout<<" "<<Arr2;
		  }
        Tmp1[i]++;      //move to the next position in the new array
     }
     // Push remaining elements to end of new array when 1 feeder array is empty
     while (Tmp1[i] <100)
     {
           Tmp1[i] = Arr1[i];
           Arr1[i]++;
           Arr3[i]++;
     }
     while (Arr2[i] < 100)
     {
           Tmp1[i] = Arr2[i];
           Arr2[i]++;
           Arr3[i]++;
     }
     return;
}