sstf.c

# include<stdio.h>
#include<stdlib.h>
int main()
{
    int R[100],i,n,TotalHeadMoment=0,initial,count=0;
     printf("enter the number of requests\n"); 
    scanf("%d",&n);
   printf("enter the request order\n");
    for(i=0;i<n;i++)
     scanf("%d",&R[i]);
    printf("enter the current(initial) head  position\n"); 
    scanf("%d",&initial);
    
    while(count!=n)
    {
        int min=1000,diff,index;
        for(i=0;i<n;i++)
        {
           diff=abs(R[i]-initial);
           if(min>diff)
           {
               min=diff;
               index=i;
           }
           
        }
        TotalHeadMoment=TotalHeadMoment+min;
        initial=R[index];
          
       R[index]=1000;
        
        count++;
    }
    printf("Total head movement is %d",TotalHeadMoment);
}