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发表于 2011-5-23 02:55:58
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来自: 中国辽宁
按lisp的规矩,函数运行结束后会显示函数的返回值,也就是最后的结果.具体到这个例程,就是最后一行(princ "度")的结果:显示一个字符"度"
/ Y3 \; `9 F8 g) x* B, }在自定义函数的最后一个右括号之前添加一行(princ),函数的返回值就成为空值了,就不会有多余的显示.- (defun C:15 ()
9 M1 H* s9 d+ n - (setq pa (getpoint "请输入三角形左下的点:"))" y0 Z# k, {; W/ g
- (setq ww (getreal "\n 输入底边长度:"))
. ]% U/ \; H5 F/ Y, D2 U: f - (setq kk (getreal "\n 输入斜边长度:")) T6 s" k( ?* j! {, p
- (setq pb (polar pa 0 ww))2 P1 ]5 q' I: ~. \
- (setq hh (sqrt (- (* kk kk) (* ww ww))))8 N' r, p$ T5 r# p. ~
- (setq pc (polar pa (/ pi 2) hh))" a0 m( P8 b! |( P p: a j
- 0 K1 x3 O6 H1 n6 b n
- ;; (setvar "OsMode" 0) ;捕捉
: M8 l2 r- I p$ J w - (command "pline" pa pb pc "c")# h7 Q/ T* S' q( W9 a0 I, `$ I$ H
- (princ "\n 另一边hh的长度=")8 y1 T6 v ?3 a
- (princ hh)
* z( [" R3 [2 D; N& @$ H a4 d7 Z - (setq ang_pb (atan (/ hh ww)))
# Y: s# G3 y y6 J$ H. {6 O - (setq ang_pb (* ang_pb (/ 180 pi)))
|, i7 H0 p+ I8 Q - (setq ang_pc (- 90 ang_pb))/ j4 j( h6 i; N+ E. p
- (princ "\n pb的夹角=")
9 r7 e+ h: l2 H; X" Q4 C - (princ ang_pb) (princ "度")
8 i+ I" ~: y9 _$ n# o7 M9 B( h- U, Y! X - (princ "\n pc的夹角=") (princ ang_pc)/ `1 S1 O! T! {; b" `! d. k( S
- (princ "度")" _' I8 e# |8 c- x5 K# Y0 y E
- (princ)
8 ?0 B- D* N3 f1 I) w( j' Z - )
/ w' {: h* b( d5 L0 d; A5 S - (prompt "\n 自动完成 ")8 d/ k7 A8 k9 R9 C
- (prin1)
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