c++ program to perform Page replacement using Least Recently Used (LRU) technique.

#include<iostream>
#include<fstream>
using namespace std;

int main()
{
char c[12];
int size=3,fpoint=0,top=0;
int frame[3],stack[3];
cout<<"enter your string:";
cin>>c;
int i,j,val,flag=0,temp,fault=0;
for(i=0;c[i]!='\0';i++)
{

val=c[i]-'0';
    if(top!=size)
    {
        stack[top]=i;
        frame[i]=val;
        fpoint++;
        top++;
        fault++;
    }
    else
    {
        flag=0;
        for(j=0;j<fpoint;j++)
        {
            if(frame[j]=val)
            {   
                int z=0;
                while(stack[z]!=j)
                {
                    z++;
                }
                temp=stack[z];
                for(int x=z;x<top-1;x++)
                {
                    stack[x]=stack[x+1]
                }
                stack[top-1]=temp;
                flag=1;
            break;
            }
       
                               
        }
        if(flag!=1)
        {        frame[stack[0]]=val;
                temp=stack[0];
                for(int x=0;x<top-1;x++)
                {
                    stack[x]=stack[x+1]
                }
                stack[top-1]=temp;
                fault++;
        }
       
    }
}
return 0;
}

Various Process Scheduling Algorithms:

• First come First served Scheduling Algorithm
• Non preemptive Shortest job first (SJF) scheduling Algorithm
• preemptive shortest job first (SJF) scheduling algorithm
• Non preemptive priority scheduling algorithm
• preemptive priority scheduling algorithm
• Roun Robin scheduling Algorithm

Various Page Replacement Algorithms:

• Page replacement using Least Recently Used (LRU) algorithm techneques.
• Page replacement using First come first served algorithm techniques.

Various Disk Head Movement Counting Algorithms:

• Count the disk head movement using first come first served (FCFS) algorithm
• head movement count using shortest seek job first (SSJF)
• head movement count using scan scheduling algorithm
• head movement count using c-scan scheduling algorithm
• head movement count using loop scheduling algorithm
• head movement count using c-loop scheduling alogrithm