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<pre align="left"><font face="Arial, Helvetica, sans-serif" size="4" color="#000000"><b>
<font color="#FF0000" size="5">8.1 the symbol table abstract data type</font>
<font color="#0033CC">dictionary</font> ~ <font color="#FF0000">symbol table</font>
<font color="#0033CC">symbol table</font> --- a set of name-attribute pairs
<font color="#FF0000">general operations</font>
* determine if a particular name is in the table
* retrieve the attributes of the name
* modify the attributes of the name
* insert a new name and its attributes
-----------------------------------------------------------------------------------
structure <font color="#FF0000">SymbleTable</font>(SymTab) is
<font color="#0033CC"> objects:</font>a set of name-attribute pairs, where the names are
unique.
<font color="#0033CC"> function:</font>
for all name <img src="image/belong.gif" width="13" height="12" align="middle"> Name ,attr <img src="image/belong.gif" width="13" height="12" align="middle"> Attribute, symtab <img src="image/belong.gif" width="13" height="12" align="middle"> SymbleTable,
max_size <img src="image/belong.gif" width="13" height="12" align="middle"> integer.
<font color="#FF0000">SymTab Create</font>(max_size) ::= Create the empty symbol
table whose maximum
capacity is max_size.
<font color="#FF0000">Boolean IsIn</font>(symtab,name) ::= if (name is in symtab) return
TRUE else return FALSE.
<font color="#FF0000">Attribute Find</font>(symtab,name)::= if (name is in symtab) return
the corresponding attribute
else return null attribute.
<font color="#FF0000">SymTab Insert</font>(symtab,name,attr)::= if (name is in symtab) replace
its existing attribute with attr
else insert the pair (name,attr)
into symtab.
<font color="#FF0000">SymTab Delete</font>(symtab,name) ::= if (name is not in symtab)
return else delete (name,attr)
from symtab.
-----------------------------------------------------------------------------------
<font color="#FF0000">basic operations: </font> <i><font color="#0033CC">searching insertion deleting</font></i>
<font color="#FF0000">hashing</font> ( hashing function ) --
<i><font color="#0033CC"> static hashing dynamic hashing
</font></i></b></font></pre>
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