[Python-checkins] python/dist/src/Doc/lib libdecimal.tex,1.6,1.7

[rhettinger at users.sourceforge.net]

Update of /cvsroot/python/python/dist/src/Doc/lib
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv22699

Modified Files:
	libdecimal.tex 
Log Message:
Demonstrate how to round final result.

Index: libdecimal.tex
===================================================================
RCS file: /cvsroot/python/python/dist/src/Doc/lib/libdecimal.tex,v
retrieving revision 1.6
retrieving revision 1.7
diff -C2 -d -r1.6 -r1.7
*** libdecimal.tex	5 Jul 2004 21:13:28 -0000	1.6
--- libdecimal.tex	6 Jul 2004 01:55:14 -0000	1.7
***************
*** 933,939 ****
  
      >>> print pi()
!     3.141592653589793238462643383279502887
      """
!     getcontext().prec += 9  # extra digits for intermediate steps
      three = Decimal(3)      # substitute "three=3.0" for regular floats
      lastc, t, c, n, na, d, da = 0, three, 3, 1, 0, 0, 24
--- 933,939 ----
  
      >>> print pi()
!     3.141592653589793238462643383
      """
!     getcontext().prec += 2  # extra digits for intermediate steps
      three = Decimal(3)      # substitute "three=3.0" for regular floats
      lastc, t, c, n, na, d, da = 0, three, 3, 1, 0, 0, 24
***************
*** 944,949 ****
          t = (t * n) / d
          c += t
!     getcontext().prec -= 9
!     return c
  
  def exp(x):
--- 944,949 ----
          t = (t * n) / d
          c += t
!     getcontext().prec -= 2
!     return c + 0
  
  def exp(x):
***************
*** 951,957 ****
  
      >>> print exp(Decimal(1))
!     2.718281828459045235360287471352662498
      >>> print exp(Decimal(2))
!     7.389056098930650227230427460575007813
      >>> print exp(2.0)
      7.38905609893
--- 951,957 ----
  
      >>> print exp(Decimal(1))
!     2.718281828459045235360287471
      >>> print exp(Decimal(2))
!     7.389056098930650227230427461
      >>> print exp(2.0)
      7.38905609893
***************
*** 959,963 ****
      (7.38905609893+0j)
      """
!     getcontext().prec += 9  # extra digits for intermediate steps
      i, laste, e, fact, num = 0, 0, 1, 1, 1
      while e != laste:
--- 959,963 ----
      (7.38905609893+0j)
      """
!     getcontext().prec += 2  # extra digits for intermediate steps
      i, laste, e, fact, num = 0, 0, 1, 1, 1
      while e != laste:
***************
*** 967,972 ****
          num *= x     
          e += num / fact   
!     getcontext().prec -= 9        
!     return e
  
  def cos(x):
--- 967,972 ----
          num *= x     
          e += num / fact   
!     getcontext().prec -= 2        
!     return e + 0
  
  def cos(x):
***************
*** 974,978 ****
  
      >>> print cos(Decimal('0.5'))
!     0.8775825618903727161162815826038296521
      >>> print cos(0.5)
      0.87758256189
--- 974,978 ----
  
      >>> print cos(Decimal('0.5'))
!     0.8775825618903727161162815826
      >>> print cos(0.5)
      0.87758256189
***************
*** 980,984 ****
      (0.87758256189+0j)
      """
!     getcontext().prec += 9  # extra digits for intermediate steps
      i, laste, e, fact, num, sign = 0, 0, 1, 1, 1, 1
      while e != laste:
--- 980,984 ----
      (0.87758256189+0j)
      """
!     getcontext().prec += 2  # extra digits for intermediate steps
      i, laste, e, fact, num, sign = 0, 0, 1, 1, 1, 1
      while e != laste:
***************
*** 989,994 ****
          sign *= -1
          e += num / fact * sign 
!     getcontext().prec -= 9        
!     return e    
  
  def sin(x):
--- 989,994 ----
          sign *= -1
          e += num / fact * sign 
!     getcontext().prec -= 2        
!     return e + 0
  
  def sin(x):
***************
*** 996,1000 ****
  
      >>> print sin(Decimal('0.5'))
!     0.4794255386042030002732879352155713880
      >>> print sin(0.5)
      0.479425538604
--- 996,1000 ----
  
      >>> print sin(Decimal('0.5'))
!     0.4794255386042030002732879352
      >>> print sin(0.5)
      0.479425538604
***************
*** 1002,1006 ****
      (0.479425538604+0j)
      """
!     getcontext().prec += 9  # extra digits for intermediate steps
      i, laste, e, fact, num, sign = 1, 0, x, 1, x, 1
      while e != laste:
--- 1002,1006 ----
      (0.479425538604+0j)
      """
!     getcontext().prec += 2  # extra digits for intermediate steps
      i, laste, e, fact, num, sign = 1, 0, x, 1, x, 1
      while e != laste:
***************
*** 1011,1016 ****
          sign *= -1
          e += num / fact * sign 
!     getcontext().prec -= 9        
!     return e
  
  \end{verbatim}                                             
--- 1011,1016 ----
          sign *= -1
          e += num / fact * sign 
!     getcontext().prec -= 2        
!     return e + 0
  
  \end{verbatim}