fig02_17.pl

PERL语言资料 可以用于PERL程序设计

#!/usr/bin/perl
# Fig. 2.17: fig02_17.pl
# Using if statements with relational and equality operators

print "Please enter first integer: ";
$number1 = <STDIN>;
chomp $number1;

print "Please enter second integer: ";
$number2 = <STDIN>;
chomp $number2;

print "The integers satisfy these relationships: \n";

if ( $number1 == $number2 ) {
   print "$number1 is equal to $number2.\n";
}

if ( $number1 != $number2 ) {
   print "$number1 is not equal to $number2.\n";
}

if ( $number1 < $number2 ) {
   print "$number1 is less than $number2.\n";
}

if ( $number1 > $number2 ) {
   print "$number1 is greater than $number2.\n";
}

if ( $number1 <= $number2 ) {
   print "$number1 is less than or equal to $number2.\n";
}

if ( $number1 >= $number2 ) {
   print "$number1 is greater than or equal to $number2.\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.                     #
###########################################################################