如果我这么写：print "$count{ "fred" }"; （在哈希前后加上双引号）程序就会报错：Unquoted string "fred" may clash with future reserved word at ./perl.pl line 762.String found where operator expected at ./perl.pl line 762, near "fred" }""syntax error at ./perl.pl line 762, at EOFExecution of ./perl.pl aborted due to compilation errors.这是为什么啊？那是因为你的“”里...
