----------------------------------------------------------------------------------------------------
Test 1

Use of uninitialized value in print at D:\test\test.pl line 7.
Argument "a" isn't numeric in addition (+) at D:\test\test.pl line 8.
1

Use of uninitialized value in print at D:\test\test.pl line 38.
Argument "foo 1" isn't numeric in addition (+) at D:\test\test.pl line 39.
1
----------------------------------------------------------------------------------------------------

----------------------------------------------------------------------------------------------------
Test 2

Argument "a" isn't numeric in addition (+) at D:\test\test.pl line 19.
1

Argument "foo 2" isn't numeric in addition (+) at D:\test\test.pl line 39.
1
----------------------------------------------------------------------------------------------------

----------------------------------------------------------------------------------------------------
Test 3

Use of uninitialized value in print at D:\test\test.pl line 27.
Argument "a" isn't numeric in addition (+) at D:\test\test.pl line 28.
1

Use of uninitialized value in print at D:\test\test.pl line 38.
Argument "foo 3" isn't numeric in addition (+) at D:\test\test.pl line 39.
1
----------------------------------------------------------------------------------------------------