fig05_17.pl

来自「PERL语言资料 可以用于PERL程序设计」· PL 代码 · 共 34 行

#!/usr/bin/perl
# Fig. 5.17: fig05_17.pl
# Using function 'die' to terminate a program.

print "Please enter a numerator: ";
chomp( $numerator = <STDIN> );

print "Please enter a denominator: ";
chomp( $denominator = <STDIN> );

# if condition is false, program prints message and terminates
$denominator != 0 or die "Cannot divide by zero";

# executes only if $denominator is not 0
print "\nThe result is ", $numerator / $denominator, "\n";



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