8.c

#include <stdio.h>
int main(int argc, char const *argv[])
{
  int ms, ps, nop, np, rempages, i, j, x, y, pa, offset;
  int s[10], fno[10][20];

  printf("\nEnter the memory size -- ");
  scanf("%d", &ms);

  printf("\nEnter the page size -- ");
  scanf("%d", &ps);

  nop = ms / ps;
  printf("\nThe no. of pages available in memory are -- %d ", nop);
  printf("\nEnter number of processes -- ");
  scanf("%d", &np);
  rempages = nop;
  for (i = 1; i <= np; i++)
  {
    printf("\nEnter no. of pages required for p[%d]-- ", i);
    scanf("%d", &s[i]);

    if (s[i] > rempages)
    {
      printf("\nMemory is Full");
      break;
    }
    rempages = rempages - s[i];
    printf("\nEnter pagetable for p[%d] --- ", i);
    for (j = 0; j < s[i]; j++)
      scanf("%d", &fno[i][j]);
  }
  printf("\nEnter process no., pagenumber, offset -- ");
  scanf("%d %d %d", &x, &y, &offset);

  if (x > np || y >= s[i] || offset >= ps)
    printf("\nInvalid Process or Page Number or offset");

  else
  {
    pa = fno[x][y] * ps + offset;
    printf("\nThe Physical Address is : %d", pa);
  }
  printf("\n");
  return 0;
}