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MergeSort.c
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68 lines (67 loc) · 795 Bytes
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#include<stdio.h>
#include<stdlib.h>
void merge(int a[],int l,int m,int r)
{
int n1,n2,i,j,k;
n1=m-l+1;
n2=r-m;
int L[n1],R[n2];
for(i=0;i<n1;i++)
{
L[i]=a[l+i];
}
for(j=0;j<n2;j++)
{
R[j]=a[m+1+j];
}
i=0;j=0;k=l;
while(i<n1 && j<n2)
{
if(L[i]<R[j])
{
a[k]=L[i];
i++;k++;
}
else
{
a[k]=R[j];
j++;k++;
}
}
while(i<n1)
{
a[k]=L[i];
i++;k++;
}
while(j<n2)
{
a[k]=R[j];
k++;j++;
}
}
void mergesort(int a[],int l, int r)
{
if(l<r)
{
int m=(l+r)/2;
mergesort(a,l,m);
mergesort(a,m+1,r);
merge(a,l,m,r);
}
}
main()
{
int i,a[10],n;
printf("\n enter the number of element");
scanf("%d",&n);
for(i=0;i<n;i++)
{
scanf("%d",&a[i]);
}
mergesort(a,0,n);
printf("\n sorted aray:");
for(i=0;i<n;i++)
{
printf("%d",a[i]);
}
}