FIRST_FIT.C

#include<stdio.h>
#include<conio.h>
#define max 25
void main()
{
 int frag[max],b[max],f[max],i,j,nb,nf,temp;
 static int bf[max],ff[max];
 clrscr();
 
 printf("\n\tMemory Management Scheme - First Fit");
 printf("\nEnter the number of blocks:");
 scanf("%d",&nb);
 printf("Enter the number of files:");
 scanf("%d",&nf);
 printf("\nEnter the size of the blocks:-\n");
 for(i=1;i<=nb;i++) {printf("Block %d:",i);scanf("%d",&b[i]);}
 printf("Enter the size of the files :-\n");
 for(i=1;i<=nf;i++) {printf("File %d:",i);scanf("%d",&f[i]);}
 
 for(i=1;i<=nf;i++)
 {
  for(j=1;j<=nb;j++)
  {
   if(bf[j]!=1)
   {
    temp=b[j]-f[i];
    if(temp>=0)
    {
     ff[i]=j;
     break;
    }
   }
  }
  frag[i]=temp;
  bf[ff[i]]=1;
 }
 printf("\nFile_no:\tFile_size :\tBlock_no:\tBlock_size:\tFragement");
 for(i=1;i<=nf;i++)
 printf("\n%d\t\t%d\t\t%d\t\t%d\t\t%d",i,f[i],ff[i],b[ff[i]],frag[i]);
 getch();
}