FIFO(Memory Management)

#include<stdio.h>
#include<conio.h>
int main()
{
    int i,j,k,l,page[10],buf,buff[10],pagefault,num,temp,flag=1;
    printf("\n Enter the number of paging sequence do u wanna enter:");
    scanf("%d",&num);
    printf("\n\n Enter the paging sequence:");
    for(i=0;i<num;i++)
    {
            printf("\n page %d.",i+1);
            scanf("%d",&page[i]);
    }
    printf("\n\n Enter the buffer size:");
    scanf("%d",&buf);
    for(j=0;j<buf;j++)
    {
            buff[j]=0;
    }
    pagefault=0;
    k=0;
    flag=1;
    for(i=0;i<num;i++)
    {
                      flag=1;
                      for(j=0;j<buf;j++)
                      {
                                        if(buff[j]==page[i])
                                        {
                                          flag=0;
                                          break;
                                        }
                                       
                      }
          j=0;
          if(flag==0)
          {
                     continue;
         
          }
          else
          {
              if(k <buf)
              {
                   buff[k]=page[i];
                   k++;
                   pagefault++;
                   printf("\n Now Pages Are:");
                   for(l=0;l<buf;l++)
                   {
                     if(buff[l]!=0)
                     {
                                   printf("    %d",buff[l]);
                     }
                   }
                   continue;
                   
               }
              for(j=0;j<buf-1;j++)
              {
                                  temp=buff[j+1];
                                  buff[j+1]=buff[j];
                                  buff[j]=temp;
              }
              buff[buf-1]=page[i];
              pagefault++;
               printf("\n Now Pages Are:");
                   for(l=0;l<buf;l++)
                   {
                     if(buff[l]!=0)
                     {
                                   printf("    %d",buff[l]);
                     }
                   }
                   }
          }
          printf("\n\n\t Hence the page faults are=%d",pagefault);
   
   getch();
   return 0;
}
Gurpreet Singh