Memory allocation error in C during hashing - c

Question

I am new to C programming and I was trying to implement typedef and hashing in my code.But I am getting compilation error when I try to allocate memory -
This is my header file
#define MAX1 11
#define MAX2 23
typedef short IP[4];
typedef enum{TRUE = 1,FALSE = 0}boolean;
typedef struct
{
IP p;
char *comp_name;
}Element;
typedef struct
{
Element e;
boolean deleted; // deleted flag
boolean empty;
}Cell;
typedef Cell secLevelHashTable[MAX2];
typedef struct secLevelHashTable *FirstLevelHashTable[MAX1];
typedef struct FirstLevelHashTable hashTable;
This my main code-
#include"hashDef.h"
#include<stdio.h>
#include<stdlib.h>
void initFirstHTable(hashTable H)
{
int i,j;
for(i=0;i<MAX1;i++)
{
H. FirstLevelHashTable[i]=(secLevelHashTable *)malloc(sizeof(secLevelHashTable));
H.FirstLevelHashTable[i]->secLevelHashTable=malloc(sizeof(Cell)*MAX2);
for(j=0;j<MAX2;j++)
{
initSecHTables(H.FirstLevelHashTable[i]->secLevelHashTable[j]);
}
}
}
void initSecHTables(Cell *ptr)
{
ptr->deleted=0;
ptr->empty=1;
}
int main()
{
hashTable h;
h=malloc(sizeof(FirstLevelHashTable));
initFirstHTable(h);
return 0;
}
This is the error I am getting-
In function ‘main’:
hashOps.c:79:13: error: storage size of ‘h’ isn’t known
hashTable h;

Answer 1

Fixed code below. It had numerous small issues and a big one.
Please read the related article the big one:
struct in C: Error storage size of 'params' isn't known -- this will explain "storage size unknown" error; by saying typedef struct FirstLevelHashTable hashTable; you were defining an unfinished struct, rather than referring to existing type.
Header file:
#define MAX1 11
#define MAX2 23
typedef short IP[4];
typedef enum{TRUE = 1,FALSE = 0}boolean;
typedef struct
{
IP p;
char *comp_name;
}Element;
typedef struct
{
Element e;
boolean deleted; // deleted flag
boolean empty;
}Cell;
typedef Cell secLevelHashTable[MAX2];
typedef secLevelHashTable* FirstLevelHashTable[MAX1];
typedef FirstLevelHashTable hashTable;
Main code:
#include"hashDef.h"
#include <stdio.h>
#include <stdlib.h>
void initSecHTables(Cell *ptr)
{
ptr->deleted=0;
ptr->empty=1;
}
void initFirstHTable(hashTable H)
{
int i,j;
for(i=0;i<MAX1;i++)
{
H[i]=(secLevelHashTable *)malloc(sizeof(secLevelHashTable));
for(j=0;j<MAX2;j++)
{
initSecHTables(&((*H[i])[j]));
}
}
}
int main()
{
hashTable h;
initFirstHTable(h);
return 0;
}