(SETQ O1 (SQRT 0.15 ) PI/2 (* 0.5 PI )
R (/ 5.0 18.0 ) &L (LIST R (/ 8.0 18.0 ) R ) R NIL
Z: CADDR # MAPCAR APP APPEND \ REVERSE
)
(DEFUN SIGMA(FX X XX DX / SA SA+ X` )
; (PRINT (LIST 'SIGMA FX X XX DX ))
(IF (= 'INT (TYPE DX ))(SETQ DX (/ (- XX X )(FLOAT DX ))))
(IF (NUMBERP (FX (+ X DX )))
(SETQ SA 0.0 SA+ SAH )(SETQ SA+ SHL ))
(WHILE (< (SETQ X` (+ X DX )) XX )
(SA+ X DX )(SETQ X X` )
(IF (> X PI )(SETQ DX (+ DX (* DX (MIN 1.0 DX )))));改变步长
)
(IF (< (- XX X )(* 0.01 DX )) SA (SA+ X (- XX X )))
)
(DEFUN SAH(X DX / FI )
(SETQ FI (# 'FX (XIX (+ X (* 0.5 DX ))(* O1 DX ))))
; (PRINT (LIST 'X= X 'FX= FI ))
(SETQ SA (+ SA (* DX (R* &L FI ))))
)
(DEFUN SHL(X DX )
(SETQ SA (APP SA (LIST (FX (+ X (* 0.5 DX )))))))
(DEFUN XIX(X I )(LIST (- X I ) X (+ X I )))