out.dat

来自「c语言小程序100个」· DAT 代码 · 共 21 行

hgfedcba
876594321
eld, on several fields to be usedyxutroonnnnniifeeedccaaaaY       
at you want to use as a key. Thehtttttsrrrrpoooonhhgfeeeea,,     
ess to specific records and definecyyxwuussqoonnllkkiiieeedccaa      
f a ISAM file. After you no longerutssssrrrrqpoooonnliigfeeeedca    
ddition and indexes have no effectAyxuttonnnnliieeeeeedddcaa.,       
or on other indexes.ttsrroonheeddcaa    
ch record to uniquely identify thatywutonnnmlliiiiffeeeddaaaaY        
he file. For example, the Employeettsrrrrrroooonmllihfeeeddcca      
not assign the same number to twoyuuuusrqoonmliiiiffeeeddbN       
r reassign these numbers to otheryyvutsrpoonnnmliffeeeeeeedda,    
 modify the record belonging to ayywutssrpoooonmliihffeeedI.      
d saves the thouble of determininglyuutssqpponmliiiiihffeeeeeecc,    
he correct record.ywvuttrohhheeea   
, you must find the first recorddyvuuutqooonnliihffeeedaaI       
 whether the record is the one youyyutttsrronnmmkihheeeeeeddcaa     
ou must search again to find others.ywtttttsrrooonnniihfeeeccaI.,        
e field within your records, youuyywvuuuttqooonnkihhfeaaaI       
scription, and ISAM will allow onlyyutttsnnnlkiiihhfeeeeddcccaa