DIVIDE AND CONQUER TECHNIQUE


MERGE SORT USING DIVIDE AND CONQUER TECHNIQUE



#include<iostream.h>
#include<conio.h>
void merge(int low,int mid,int high);
int a[100];
class sort
{
public:
int i,n,low,high;
void mergesort(int low,int high);
};
void sort::mergesort(int low,int high)
{
if(low<high)
{
int mid;
mid=(low+high)/2;
mergesort(low,mid);
mergesort(mid+1,high);
merge(low,mid,high);
}
}
void merge(int low,int mid,int high)
{
int h,i,j,k,b[100];
h=low;
i=low;
j=mid+1;
while(h<=mid&&j<=high)
{
if(a[h]<=a[j])
{
b[i]=a[h];
h=h+1;
}
else
{
b[i]=a[j];
j=j+1;
}
i=i+1;
}
if(h>mid)
{
for(k=j;k<=high;k++)
{
b[i]=a[k];

i=i+1;
}
}
else
{
for(k=h;k<=mid;k++)
{
b[i]=a[k];
i=i+1;
}
}
for(k=low;k<=high;k++)
{
a[k]=b[k];
}
}
void main()
{
int n,i,low,high;
clrscr();
sort obj;
cout<<"\nEnter the no.of Elements";
cin>>n;
cout<<"\nEnter the Elements";
for(i=0;i<n;i++)
cin>>a[i];
low=0;
high=n-1;
obj.mergesort(low,high);
cout<<"\nSorted list are:";
for(i=0;i<n;i++)
cout<<"\n"<<a[i];
getch();
}
 


OUTPUT:
           
                       
        MERGE SORT USING DIVIDE AND CONQUER METHOD

Enter the no.of Elements5

Enter the Elements12
90
5
3
21

Sorted list are:
3
5
12
21
90
 

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