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Diff for /src/usr.bin/dc/dc.1 between version 1.9 and 1.10

version 1.9, 2003/10/18 21:00:17 version 1.10, 2003/10/19 18:39:13
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 x y / x y %  x y / x y %
 .Ed  .Ed
 The division and modulus operator is a non-portable extension.  The division and modulus operator is a non-portable extension.
 .It Ic s Ns Ar x  .It Ic c
   All values on the stack are popped.
   .It Ic d
   The top value on the stack is duplicated.
   .It Ic f
   All values on the stack are printed, separated by newlines.
   .It Ic i
   The top value on the stack is popped and used as the
   base for further input.
   The initial input base is 10.
   .It Ic I
   Pushes the input base on the top of the stack.
   .It Ic J
   Pop the top value of the stack.
   The recursion level is popped by that value and, following that,
   the input is skipped until the first occurrence of the
   .Ic M
   operator.
 The  The
 top of the stack is popped and stored into  .Ic J
 a register named  operator is a non-portable extensions, used by the
 .Ar x ,  .Xr bc 1
 where  command.
   .It Ic K
   The current scale factor is pushed onto the stack.
   .It Ic k
   The top of the stack is popped, and that value is used as
   a non-negative scale factor:
   the appropriate number of places
   are printed on output,
   and maintained during multiplication, division, and exponentiation.
   The interaction of scale factor,
   input base, and output base will be reasonable if all are changed
   together.
   .It Ic L Ns Ar x
   Register
 .Ar x  .Ar x
 may be any character, including space, tab or any other special character.  is treated as a stack and its top value is popped onto the main stack.
 If the  
 .Ic s  
 is capitalized,  
 .Ar x  
 is treated as a stack and the value is pushed on it.  
 .It Ic l Ns Ar x  .It Ic l Ns Ar x
 The  The
 value in register  value in register
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 .Ar x  .Ar x
 is not altered.  is not altered.
 Initially, all registers contain the value zero.  Initially, all registers contain the value zero.
 If the  .It Ic M
 .Ar l  Mark used by the
 is capitalized,  .Ic J
 register  operator.
 .Ar x  The
 is treated as a stack and its top value is popped onto the main stack.  .Ic M
 .It Ic d  operator is a non-portable extensions, used by the
 The top value on the stack is duplicated.  .Xr bc 1
 .It Ic p  command.
 The top value on the stack is printed with a trailing newline.  .It Ic O
 The top value remains unchanged.  Pushes the output base on the top of the stack.
   .It Ic o
   The top value on the stack is popped and used as the
   base for further output.
   The initial output base is 10.
 .It Ic P  .It Ic P
 The top of the stack is popped.  The top of the stack is popped.
 If the top of the stack is a string, it is printed without a trailing newline.  If the top of the stack is a string, it is printed without a trailing newline.
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 an  an
 .Tn ASCII  .Tn ASCII
 character, without a trailing newline.  character, without a trailing newline.
 .It Ic f  .It Ic p
 All values on the stack are printed, separated by newlines.  The top value on the stack is printed with a trailing newline.
   The top value remains unchanged.
   .It Ic Q
   The top value on the stack is popped and the string execution level is popped
   by that value.
 .It Ic q  .It Ic q
 Exits the program.  Exits the program.
 If executing a string, the recursion level is  If executing a string, the recursion level is
 popped by two.  popped by two.
 If  .It Ic S Ns Ar x
 .Ic q  Register
 is capitalized,  .Ar x
 the top value on the stack is popped and the string execution level is popped  is treated as a stack.
 by that value.  The top value of the main stack is popped and pushed on it.
   .It Ic s Ns Ar x
   The
   top of the stack is popped and stored into
   a register named
   .Ar x ,
   where
   .Ar x
   may be any character, including space, tab or any other special character.
   .It Ic v
   Replaces the top element on the stack by its square root.
   The scale of the result is the maximum of the scale of the argument
   and the current value of scale.
   .It Ic X
   Replaces the number on the top of the stack with its scale factor.
   If the top of the stack is a string, replace it with the integer 0.
 .It Ic x  .It Ic x
 Treats the top element of the stack as a character string  Treats the top element of the stack as a character string
 and executes it as a string of  and executes it as a string of
 .Nm  .Nm
 commands.  commands.
 .It Ic X  .It Ic Z
 Replaces the number on the top of the stack with its scale factor.  Replaces the number on the top of the stack with its length.
 If the top of the stack is a string, replace it with the integer 0.  The length of a string is its number of characters.
   The length of a number is its number of digits, not counting the minus sign
   and decimal point.
   .It Ic z
   The stack level is pushed onto the stack.
 .It Cm [ Ns ... Ns Cm ]  .It Cm [ Ns ... Ns Cm ]
 Puts the bracketed  Puts the bracketed
 .Tn ASCII  .Tn ASCII
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 .Ar x  .Ar x
 is executed if they obey the stated  is executed if they obey the stated
 relation.  relation.
 .It Ic v  
 Replaces the top element on the stack by its square root.  
 The scale of the result is the maximum of the scale of the argument  
 and the current value of scale.  
 .It Ic \&!  .It Ic \&!
 Interprets the rest of the line as a  Interprets the rest of the line as a
 .Ux  .Ux
 command.  command.
 .It Ic c  
 All values on the stack are popped.  
 .It Ic i  
 The top value on the stack is popped and used as the  
 base for further input.  
 The initial input base is 10.  
 .Ic I  
 Pushes the input base on the top of the stack.  
 .It Ic o  
 The top value on the stack is popped and used as the  
 base for further output.  
 The initial output base is 10.  
 .It Ic O  
 Pushes the output base on the top of the stack.  
 .It Ic k  
 The top of the stack is popped, and that value is used as  
 a non-negative scale factor:  
 the appropriate number of places  
 are printed on output,  
 and maintained during multiplication, division, and exponentiation.  
 The interaction of scale factor,  
 input base, and output base will be reasonable if all are changed  
 together.  
 .It Ic K  
 The current scale factor is pushed onto the stack.  
 .It Ic z  
 The stack level is pushed onto the stack.  
 .It Ic Z  
 Replaces the number on the top of the stack with its length.  
 The length of a string is its number of characters.  
 The length of a number is its number of digits, not counting the minus sign  
 and decimal point.  
 .It Ic \&?  .It Ic \&?
 A line of input is taken from the input source (usually the terminal)  A line of input is taken from the input source (usually the terminal)
 and executed.  and executed.
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 is written in an array that is later popped, to reveal the array that  is written in an array that is later popped, to reveal the array that
 stored  stored
 .Ql first .  .Ql first .
 .It Ic J  
 Pop the top value of the stack.  
 The recursion level is popped by that value and, following that,  
 the input is skipped until the first occurrence of the  
 .Ic M  
 operator.  
 .It Ic M  
 Mark used by the  
 .Ic J  
 operator.  
 The  
 .Ic J  
 and  
 .Ic M  
 operators are non-portable extensions, used by the  
 .Xr bc 1  
 command.  
 .El  .El
 .Sh EXAMPLES  .Sh EXAMPLES
 An example which prints the first ten values of  An example which prints the first ten values of
Legend:
Removed from v.1.9  
changed lines
  Added in v.1.10