ex4.tcl

很不错的tcl编程实例

# Copyright 1996

# Authors

# Lakshmi Sastry
# Computing and Information Systems Department
# Rutherford Appleton Laboratory, Chilton, Didcot. OX11 0QX
# [e-mail]

#                         and

# Venkat VSS Sastry
# Department of Applied Mathematics and Operational Research
# Cranfield University, RMCS Shrivenham, Swindon, SN6 8LA
# [e-mail]

# Permission to use, copy, modify, and distribute this
# software and its documentation for any purpose and without
# fee is hereby granted, provided that this copyright
# notice appears in all copies.
  
# The authors, RAL, RMCS Shrivenham, Cranfield University and AGOCG
# make no representations about the suitability of this
# software for any purpose.  It is provided "as is" without
# express or implied warranty. Likewise they accept no responsibility
# whatsoever for any public domain software modules used (which are
# hereby acknowledged) in this software 


# format - simple usage
#
# the following returns 
#    The value of pi is 3.141590000000
format "The value of pi is %.12f" [expr acos(-1)]
# to obtain double precision value use following lines
#
set tcl_precision 15
format "The value of pi is %.12f" [expr acos(-1)]