?? fig06_10.pl
字號:
#!/usr/bin/perl
# Fig. 6.10: fig06_10.pl
# Seeding the random number generator.
# during each iteration, set seed to 1,
# then produce three random integers
for ( 1 .. 3 ) {
print "\n\nSetting seed to 1\n";
srand( 1 );
# produces same three values each time
for ( 1 .. 3 ) {
print " ", 1 + int( rand( 6 ) );
}
}
print "\n\nResetting seed\n";
srand(); # let system determine seed
for (1 .. 3) {
print "\n\nAfter seed has been reset\n";
for ( 1 .. 3 ) {
print " ", 1 + int( rand( 6 ) );
}
}
print "\n";
###########################################################################
# (C) Copyright 2001 by Deitel & Associates, Inc. and Prentice Hall. #
# All Rights Reserved. #
# #
# DISCLAIMER: The authors and publisher of this book have used their #
# best efforts in preparing the book. These efforts include the #
# development, research, and testing of the theories and programs #
# to determine their effectiveness. The authors and publisher make #
# no warranty of any kind, expressed or implied, with regard to these #
# programs or to the documentation contained in these books. The authors #
# and publisher shall not be liable in any event for incidental or #
# consequential damages in connection with, or arising out of, the #
# furnishing, performance, or use of these programs. #
###########################################################################
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