Linked File Allocation

Write a C Program to implement Linked File Allocation method.
#include<stdio.h>
#include<conio.h>
#include<stdlib.h>
void main()
{
int f[50], p,i, st, len, j, c, k, a;
clrscr();
for(i=0;i<50;i++)
f[i]=0;
printf("Enter how many blocks already allocated: ");
scanf("%d",&p);
printf("Enter blocks already allocated: ");
for(i=0;i<p;i++)
{
 scanf("%d",&a);
 f[a]=1;
}
x: printf("Enter index starting block and length: ");
scanf("%d%d", &st,&len);
k=len;
if(f[st]==0)
{
 for(j=st;j<(st+k);j++)
 {
 if(f[j]==0)
 {
 f[j]=1;
 printf("%d-------->%d\n",j,f[j]);
 }
 else
 {
 printf("%d Block is already allocated \n",j);
 k++;
 }
 }
}
else
printf("%d starting block is already allocated \n",st);
printf("Do you want to enter more file(Yes - 1/No - 0)");
scanf("%d", &c);
if(c==1)
 goto x;
else
 exit(0);
getch();
}
Output: