Write a C Program To Implement FIFO Page Replacement Algorithm in operating system

#include<stdio.h>

int i,j,nof,nors,flag=0,ref[50],frm[50],pf=0,victim=-1;

void main()

{
     
printf("\n \t\t\t FIFI PAGE REPLACEMENT ALGORITHM");
     
printf("\n Enter no.of frames...."); // Get number of frames from user
scanf("%d",&nof);
printf("Enter number of reference string..\n");

scanf("%d",&nors);

printf("\n Enter the reference string..");

for(i=0;i<nors;i++)

scanf("%d",&ref[i]);

printf("\nThe given reference string:");

for(i=0;i<nors;i++)

printf("%4d",ref[i]);

for(i=1;i<=nof;i++)

frm[i]=-1;

printf("\n");

for(i=0;i<nors;i++) // For every page
{

flag=0;
// Flag to show availability of page in frame
// Get the availability of required page in frame
printf("\n\t Reference np%d->\t",ref[i]);

for(j=0;j<nof;j++)

{

if(frm[j]==ref[i])
  // If page found in frame
{

flag=1; // Set flag to 1, showing that page is available in frame
break;
// Break the loop
}
}

if(flag==0)

{

pf++;

victim++;

victim=victim%nof;


frm[victim]=ref[i];

for(j=0;j<nof;j++)

printf("%4d",frm[j]);

}

}
printf("\n\n\t\t No.of pages faults...%d",pf);

}