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<pre align="left"><font face="Arial, Helvetica, sans-serif" size="4" color="#000000"><b>
2. <font color="#FF0000">chaining</font>
<i><font color="#0033CC">bucket ~ list </font></i>
#define MAX_CHAR 10 <i><font size="3" color="#CC0099"> /* max identifier size */</font></i>
#define TABLE_SIZE 13 <i><font size="3" color="#CC0099">/* prime number */</font></i>
#define IS_FULL( ptr ) ( !(ptr))
typedef struct {
char key [MAX_CHAR ]
<i><font size="3" color="#CC0099">/* other fields */</font></i>
} <font color="#FF0000">element</font>;
typedef struct list *list_pointer;
typedef struct <font color="#FF0000"> list </font> {
element item;
list_pointer link ;
}
list_pointer hash_table [TABLE_SIZE ];
<font color="#FF0000">Chain insert into a hash table</font>
void <font color="#FF0000">chain_insert</font> ( element item,list_pointer ht[ ] )
{
<i><font size="3" color="#CC0099">/* insert the key into the table using chaining */</font></i>
int hash_value = hash ( item.key ) ;
list_pointer ptr, trail = NULL, lead = ht[hash_value] ;
for ( ; lead ; trail = lead, lead = lead->link )
if ( !strcmp ( lead->item.key, item.key ) ){
fprintf ( stderr,"The key is in the table\n" ) ;
exit ( 1 ) ;
}
ptr = ( list_pointer )malloc ( sizeof ( list ) ) ;
if ( IS_FULL ( ptr ) ){
fprintf ( stderr,"The memory is full\n" ) ;
exit ( 1 ) ;
}
ptr->item = item ;
ptr->link = NULL ;
if ( trail )
trail->link = ptr ;
else
ht[hash_value] = ptr ;
}
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