Code-Bin #851

untitled C++ Code
Posted by: asdf | September 22, 2010 @ 5:00pm

C++ Code

#include <iostream>
using namespace std;

int a[50];
void merge_sort(int low,int high)
{
	int mid;
	if(low<high)
	{
		mid=(low+high)/3;
		merge_sort(low,mid);
		low = mid;
		mid=(mid+high)/2;
		merge_sort ( low+1, mid );
		merge_sort(mid+1,high);
		merge(low,mid,high);
	}
}
void merge(int low,int mid,int high)
{
	int h,i,j,b[50],k;
	h=low;
	i=low;
	j=mid+1;
	
	while((h<=mid)&&(j<=high))
	{
		if(a[h]<=a[j])
		{
			b[i]=a[h];
			h++;
		}
		else
		{
			b[i]=a[j];
			j++;
		}
		i++;
	}
	if(h>mid)
	{
		for(k=j;k<=high;k++)
		{
			b[i]=a[k];
			i++;
		}
	}
	else
	{
		for(k=h;k<=mid;k++)
		{
			b[i]=a[k];
			i++;
		}
	}
	for(k=low;k<=high;k++) a[k]=b[k];
}
int main()
{
	int num,i;
	
	
	cout<<"Please Enter THE NUMBER OF ELEMENTS you want to sort [THEN PRESS ENTER]:"<<endl;
	cin>>num;
	cout<<endl;
	cout<<"Now, Please Enter the ( "<< num <<" ) numbers (ELEMENTS) [THEN PRESS ENTER]:"<<endl;
	for(i=1;i<=num;i++)
	{
		cin>>a[i] ;
	}
	merge_sort(1,num);
	cout<<endl;
	cout<<"So, the sorted list (using MERGE SORT) will be :"<<endl;
	cout<<endl<<endl;
	
	for(i=1;i<=num;i++)
		cout<<a[i]<<"	";
	
	
	return 0;
	
}

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