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<pre align="left"><b><font face="Arial, Helvetica, sans-serif" size="4" color="#000000">
(3) <font color="#FF0000">Overflow handing</font>
<font color="#0033CC">methods </font>for detecting collisions and overflows in a static hash table:
<i><font color="#FF0000">linear open addressing</font></i> ( linear probing )
<i><font color="#FF0000"> chaining</font></i>
1.<font color="#0033CC"> linear open addressing </font>
#define MAX_CHAR 10 <i><font size="3" color="#CC0099"> /*max number of characters in an identifier */ </font></i>
#define TABLE_SIZE 13 <i><font size="3" color="#CC0099">/*max table size = prime number* / </font></i>
typedef struct { char key [MAX_CHAR ];
<i><font size="3" color="#CC0099"> / * other fields */</font></i>
} element;
element hash_table [ TABLE_SIZE ];
void <font color="#FF0000">init_table</font>(element ht[ ])
{ int i ;
for ( i = 0 ; i < TABLE_SIZE ; i++ )
ht[i].key[0] = NULL ;
}
<font color="#FF0000">Creation of a hash function</font>
int <font color="#FF0000">transform</font> ( char *key )
{<i><font size="3" color="#CC0099">/* simple additive approach to create a natural number
that is within the integer range */</font></i>
int number = 0 ;
while ( *key )
number += *key++ ;
return number ;
}
int <font color="#FF0000">hash</font> ( char *key )
{
<i><font size="3" color="#CC0099">/* transform key too a natural number,and return this
result modules the table size */</font></i>
return ( transform ( key )%TABLE_SIZE ) ;
}
</font></b></pre>
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