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| 1 | - | #!C:\Strawberry\perl\bin |
| 1 | + | #!C:\Strawberry\perl\bin |
| 2 | use warnings; | |
| 3 | ||
| 4 | my $stop = 0; | |
| 5 | until ($stop != 0) {
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| 6 | ||
| 7 | ||
| 8 | print "this program will compute the circumfrence of a circle.\n"; | |
| 9 | print "\n"; | |
| 10 | print "Please enter in the radius of your circle.\n"; | |
| 11 | $radius = <STDIN>; | |
| 12 | until ($radius ne "\n") {
| |
| 13 | print "please enter a number "; | |
| 14 | $radius = <STDIN>; | |
| 15 | } | |
| 16 | ||
| 17 | print "The radius of your circle is "; | |
| 18 | print 2 * 3.141592654 * $radius; | |
| 19 | print "\n"; | |
| 20 | print "do you want to calculate another?(yes/no)\n"; | |
| 21 | $stop = 0; | |
| 22 | $answer = <STDIN>; | |
| 23 | if ($answer eq "no") {
| |
| 24 | print "exiting.... \n"; | |
| 25 | - | exit; |
| 25 | + | |
| 26 | ||
| 27 | } else {
| |
| 28 | $stop = 0; | |
| 29 | } | |
| 30 | } |