C program to find occurrence of number in Array using DMA.

#include<stdio.h>
#include<conio.h>
int main()
{
    int *a;
    int i,j,n,c=1,temp,index;
    clrscr();
    printf("Enter Array size:");
    scanf("%d",&n);
    a=(int*) malloc (n * sizeof(int));
    if(a==NULL)
    {
        printf("**Memory is not allocated**");
        exit(0);
    }
    else
    {
        printf("**Memory is successfully allocated**");
        printf("\nEnter %d elements in Array:\n",n);
        for(i=0; i<n; i++)
        {
            scanf("%d",a+i);
        }
        //Sorting elements of Array.
        for(i=0; i<n; i++)
        {
            for(j=i+1; j<n; j++)
            {
                if(*(a+i)>*(a+j))
                {
                    *(a+i)=*(a+i)+*(a+j);
                    *(a+j)=*(a+i)-*(a+j);
                    *(a+i)=*(a+i)-*(a+j);
                }
            }
        }
        //Comparing elements of Array.
        for(i=0;i<n;)
        {
            for(j=i+1; j<n; j++)
            {
                if(*(a+i)==*(a+j))
                {
                  c=c+1;
                }
            }
            index=i;
            i=i+c;
            printf("\n%d is occurred in Array %d times.",a[index],c);
            c=1;
        }
    }
    return 0;
}

*** Input  && Output ***