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cscan.c
51 lines (50 loc) · 1.4 KB
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cscan.c
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#include<stdio.h>
#include<stdlib.h>
#include<math.h>
int main() {
int xrx[100], i, j, n, HeadMoment = 0, current, size, move;
printf("Enter total disk size:");
scanf("%d", &size);
printf("Enter the number of Requests:");
scanf("%d", &n);
printf("Enter the Requests sequence:\n");
for (i = 0; i < n; i++)
scanf("%d", &xrx[i]);
printf("Enter initial head position:");
scanf("%d", ¤t);
for (i = 0; i < n; i++) {
for (j = 0; j < n - i - 1; j++) {
if (xrx[j] > xrx[j + 1]) {
int temp;
temp = xrx[j];
xrx[j] = xrx[j + 1];
xrx[j + 1] = temp;
}
}
}
int index;
for (i = 0; i < n; i++) {
if (current < xrx[i]) {
index = i;
break;
}
}
printf("%d",current);
for (i = index; i < n; i++) {
HeadMoment = HeadMoment + abs(xrx[i] - current);
printf(" -> %d", xrx[i]);
current = xrx[i];
}
HeadMoment = HeadMoment + abs(size - xrx[i - 1] - 1);
HeadMoment = HeadMoment + abs(size - 1);
current = 0;
printf("-> %d",size-1);
printf("-> %d",current);
for (i = 0; i < index; i++) {
HeadMoment = HeadMoment + abs(xrx[i] - current);
current = xrx[i];
printf(" --> %d", xrx[i]);
}
printf("\nTotal head movement is: %d\n", HeadMoment);
return 0;
}