Ex_10_11_clook.sci

//This Source file is written by Nikita Rath (18BLC1131), VIT Chennai
//Function for  C-LOOK
function [] = clook(a,head,n)
    printf("Order of Track   ");
    seek_count = 0;
    ihead = head;
    temp1 = 1;
    temp2 = 1;
    //Traversing through requests
    for i = 1:n
        //Request greater or less than head
        if(a(i)>=head) then
            queue1(temp1)=a(i);
            temp1 = temp1 + 1;
        else
            queue2(temp2)=a(i);
            temp2 = temp2 + 1;
        end
    end
    //Sort request greater than head (Ascending)
    for i = 1:temp1-2
        for j = i+1:temp1-1
            if (queue1(i) > queue1(j)) then
                temp = queue1(i);
                queue1(i) = queue1(j);
                queue1(j) = temp;
            end
        end
    end
    //Sort request less than head (Ascending)
    for i = 1:temp2-2
        for j = i+1:temp2-1
            if (queue2(i) > queue2(j)) then
                temp = queue2(i);
                queue2(i) = queue2(j);
                queue2(j) = temp;
            end
        end
    end
    //Traversing to the right side
    for i = 1:temp1-1
        queue(i) = queue1(i);
        //Calculate the distance between requests
        distance = abs(queue1(i) - head);
        //Increment seek_count with the distance
        seek_count = seek_count + distance;
        head = queue1(i);
    end
    j = i+1;
    seek_count = seek_count + abs(head - queue2(1));
    head = queue2(1);
    //Traversing to the left side
    for i = 1:temp2-1
        queue(j) = queue2(i);
        j = j + 1;
        //Calculate the distance between requests
        distance = abs(queue2(i) - head);
        //Increment seek_count with the distance
        seek_count = seek_count + distance;
        head = queue2(i);
    end
    for i = 1:j
        printf("   T%d   ",i);
    end
    printf("\nNo. of Cylinders");
    printf("   %d ",ihead);
    //Order of request execution
    for i = 1:j-1
        printf("   %4d ",queue(i));
    end
    //Total distance
    printf("\n  Total distance : %d", seek_count);
endfunction