variables - Common Lisp 变量 addFraction 未绑定

Question

为什么它说变量addFraction是未绑定的？

(defun addFraction (N1 D1 N2 D2)
  (format t "~d ~d"
          (+ (+ (lcm D1 D2) N1) (+ (lcm D1 D2) N2))
          (lcm D1 D2)))

当我运行代码时，它说：

#<THREAD "main thread" RUNNING {10010B0523}>:
  The variable ADDFRACTION is unbound.

Type HELP for debugger help, or (SB-EXT:EXIT) to exit from SBCL.

restarts (invokable by number or by possibly-abbreviated name):
  0: [CONTINUE   ] Retry using ADDFRACTION.
  1: [USE-VALUE  ] Use specified value.
  2: [STORE-VALUE] Set specified value and use it.
  3: [ABORT      ] Exit debugger, returning to top level.

(SB-INT:SIMPLE-EVAL-IN-LEXENV ADDFRACTION #<NULL-LEXENV>)
0]

标签： variableslispcommon-lispsbclunbound

Answer 1

我的错！

当我调用我输入的函数时

addFunction (1 2 1 4)

代替

(addFunction 1 2 1 4)