Create Cscan. c

c/Cscan. c

@@ -0,0 +1,189 @@
+#include<stdio.h>      
+
+int main()
+
+{
+
+ 	int i,h,n,sum=0,d,t,j;	printf("Enter no.of request:");
+
+	scanf("%d",&n);
+
+	int r[n];
+
+	printf("Enter request sequence:\n");
+
+	for(i=0;i<n;i++)
+
+	{
+
+		scanf("%d",&r[i]);
+
+	}   
+
+	printf("Enter initial head position:");
+
+	scanf("%d",&h);
+
+	printf("Enter total disk size:");
+
+	scanf("%d",&t);
+
+	printf("Enter head movement direction(low:0,high:1):");
+
+	scanf("%d",&d);
+
+	for(i=0;i<n;i++)
+
+     {
+
+        for(j=0;j<n-i-1;j++)
+
+        {
+
+            if(r[j]>r[j+1])
+
+            {
+
+                int temp;
+
+                temp=r[j];
+
+                r[j]=r[j+1];
+
+                r[j+1]=temp;
+
+            }
+
+        }
+
+     }
+
+   	if(d==0)
+
+	{
+
+		for(i=0;i<n;i++) 
+
+		{
+
+			if(h<=r[i])
+
+			{
+
+				j=i;
+
+				break;
+
+			}
+
+		}  
+
+		for(i=j-1;i>=0;i=i-1)
+
+		{
+
+			sum=sum+(h-r[i]);
+
+			h=r[i];
+
+			if(i==0)
+
+			{
+
+				sum=sum+h;
+
+				h=0;	
+
+			}
+
+		}
+
+		for(i=n-1;i>=j;i=i-1)
+
+		{
+
+			if(i==n-1)
+
+			{
+
+				sum=sum+(t-1);
+
+				h=t-1;
+
+			}
+
+			sum=sum+(h-r[i]);
+
+			h=r[i];
+
+		}
+
+	}
+
+	else
+
+	{
+
+		for(i=0;i<n;i++) 
+
+		{
+
+			if(h<=r[i])
+
+			{
+
+				j=i;
+
+				break;
+
+			}
+
+		}  
+
+		for(i=j;i<n;i++)
+
+		{
+
+			sum=sum+(r[i]-h);
+
+			h=r[i];
+
+			if(i==(n-1))
+
+			{
+
+				sum=sum+((t-1)-h);
+
+				h=t-1;	
+
+			}
+
+		}
+
+		for(i=0;i<j;i++)
+
+		{
+
+			if(i==0)
+
+			{
+
+				sum=sum+(t-1);
+
+				h=0;
+
+			}
+
+			sum=sum+(r[i]-h);
+
+			h=r[i];
+
+		}
+
+	}
+
+	printf("Total head movement:%d",sum);
+
+	return 0;
+
+}