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discschedulingSCAN.c
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discschedulingSCAN.c
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#include<stdio.h>
#include<stdlib.h>
int main()
{
int RQ[100] ,i,j,n,TotalHeadMoment=0,initial,size,move;
printf("enter the requests sequence\n");
for(i=0;i<n;i++)
scanf("%d",RQ[i]);
printf("enter initial head position \n");
scanf("%d",&initial);
printf("enter total disk size\n");
scanf("%d",&size);
printf("enter the head movement direction for high 1 and for low 0\n");
scanf("%d,&move");
for(i=0;i<n;i++)
{
for(j=0;j<n-i-1;j++)
{
if(RQ[j]>RQ[j+1])
{
int temp;
temp=RQ[j];
RQ[j]=RQ[j+1];
RQ[j+1]=temp;
}
}
}
int index;
for(i=0;i<n;i++)
{
if(initial<RQ[i])
{
index=i;
break;
}
}
if(move==1)
{
printf("sequequence of request access:\n");
for(i=index;i<n;i++)
{
printf("%d",RQ[i]);
TotalHeadMoment=TotalHeadMoment+abs(RQ[i]-initial);
initial=size-1;
for(i=index-1;i>=0;i--)
{
printf("%d",RQ[i]);
TotalHeadMoment=TotalHeadMoment+abs(RQ[i]-initial);
initial=RQ[i];
}
TotalHeadMoment=TotalHeadMoment+abs(RQ[i]=initial);
initial=RQ[i];
}
}
}