{ } is an anonymous hash reference constructor, which are you attempting to assign to the arrays @c and @d. @c and @d are arrays, which are you trying to assign to the scalar array elements $b[0] and $b[1].

I don't know exactly what you're trying to do, but I would guess you want something like this.

my @c = ( 22, 44, 55 );
my @d = ( 'yy', 'tt' );
my @b;
@b[0,1] = ( $c[0], $d[0] );
my @e = ( $b[1] );
print "<$e[0]>\n";
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