Initial commit

c++/Others/Merge Sort.cpp

@@ -0,0 +1,89 @@
+Merge Sort
+
+#include <iostream.h>
+int a[50];
+void merge(int,int,int);
+void merge_sort(int low,int high)
+{
+ int mid;
+ if(low<high)
+ {
+  mid=(low+high)/2;
+  merge_sort(low,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];
+}
+void main()
+{
+ int num,i;
+
+cout<<"*******************************************************************
+*************"<<endl;
+ cout<<"                             MERGE SORT PROGRAM
+"<<endl;
+
+cout<<"*******************************************************************
+*************"<<endl;
+ cout<<endl<<endl;
+ 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]<<"  ";
+
+ cout<<endl<<endl<<endl<<endl;
+
+}