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发表于 2011-5-23 02:55:58
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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"3 }; r% r# } c, c4 w' C4 ]
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 ()4 M5 o8 {$ w6 d$ d& W" L1 f
- (setq pa (getpoint "请输入三角形左下的点:")): f, y& \6 }4 z( f# @3 u
- (setq ww (getreal "\n 输入底边长度:"))8 V [0 Q" L1 N6 d {
- (setq kk (getreal "\n 输入斜边长度:"))
6 ]; b: Q% E1 A x" s: v- h% Z - (setq pb (polar pa 0 ww))
( K0 m1 {9 ^9 q Z9 @ - (setq hh (sqrt (- (* kk kk) (* ww ww))))
& h3 u6 t( v- F3 y! I - (setq pc (polar pa (/ pi 2) hh))1 W% C* W4 g3 z. M( g
-
! v2 F* B8 ~* j& f7 L0 g6 H - ;; (setvar "OsMode" 0) ;捕捉: F1 m+ ~3 B% S z5 P
- (command "pline" pa pb pc "c")
' Z$ x b, g% `3 E3 ~( r - (princ "\n 另一边hh的长度=")" |' V4 L" a5 F( A8 ?
- (princ hh)
1 M _ u: o1 @8 w - (setq ang_pb (atan (/ hh ww)))
5 c7 c6 {& H8 k% `+ i - (setq ang_pb (* ang_pb (/ 180 pi)))
/ @% J% z; X2 k6 D: D: }' ` - (setq ang_pc (- 90 ang_pb))
/ T6 k& {5 F8 D - (princ "\n pb的夹角=")
9 Q0 c W, h7 f0 `: q, Q$ d L# @ - (princ ang_pb) (princ "度"): ]% J, s% K" S9 l# z+ o! C
- (princ "\n pc的夹角=") (princ ang_pc)3 E+ v0 Q; I$ k1 V
- (princ "度")
" C5 K- X$ H7 G; W0 i - (princ)9 P% H, l, ~3 H) U+ b' K
- ); M# M# R; r3 R
- (prompt "\n 自动完成 ")
/ j ^: u9 V. A4 X6 | - (prin1)
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