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diff --git a/gnu/usr.bin/dc/dc.info b/gnu/usr.bin/dc/dc.info deleted file mode 100644 index a30fea9..0000000 --- a/gnu/usr.bin/dc/dc.info +++ /dev/null @@ -1,330 +0,0 @@ -This is Info file dc.info, produced by Makeinfo-1.52 from the input -file dc.texinfo. - - This file documents DC, an arbitrary precision calculator. - - Published by the Free Software Foundation, 675 Massachusetts Avenue, -Cambridge, MA 02139 USA - - Copyright (C) 1984 Free Software Foundation, Inc. - - Permission is granted to make and distribute verbatim copies of this -manual provided the copyright notice and this permission notice are -preserved on all copies. - - Permission is granted to copy and distribute modified versions of -this manual under the conditions for verbatim copying, provided that -the entire resulting derived work is distributed under the terms of a -permission notice identical to this one. - - Permission is granted to copy and distribute translations of this -manual into another language, under the above conditions for modified -versions, except that this permission notice may be stated in a -translation approved by the Foundation. - - -File: dc.info, Node: Top, Next: Introduction, Prev: (dir), Up: (dir) - -* Menu: - -* Introduction:: Introduction -* Printing Commands:: Printing Commands -* Arithmetic:: Arithmetic -* Stack Control:: Stack Control -* Registers:: Registers -* Parameters:: Parameters -* Strings:: Strings -* Status Inquiry:: Status Inquiry -* Notes:: Notes - - -File: dc.info, Node: Introduction, Next: Printing Commands, Prev: Top, Up: Top - -Introduction -************ - - DC is a reverse-polish desk calculator which supports unlimited -precision arithmetic. It also allows you to define and call macros. -Normally DC reads from the standard input; if any command arguments are -given to it, they are filenames, and DC reads and executes the contents -of the files before reading from standard input. All output is to -standard output. - - To exit, use `q'. `C-c' does not exit; it is used to abort macros -that are looping, etc. (Currently this is not true; `C-c' does exit.) - - A reverse-polish calculator stores numbers on a stack. Entering a -number pushes it on the stack. Arithmetic operations pop arguments off -the stack and push the results. - - To enter a number in DC, type the digits, with an optional decimal -point. Exponential notation is not supported. To enter a negative -number, begin the number with `_'. `-' cannot be used for this, as it -is a binary operator for subtraction instead. To enter two numbers in -succession, separate them with spaces or newlines. These have no -meaning as commands. - - -File: dc.info, Node: Printing Commands, Next: Arithmetic, Prev: Introduction, Up: Top - -Printing Commands -***************** - -`p' - Prints the value on the top of the stack, without altering the - stack. A newline is printed after the value. - -`P' - Prints the value on the top of the stack, popping it off, and does - not print a newline after. - -`f' - Prints the entire contents of the stack and the contents of all of - the registers, without altering anything. This is a good command - to use if you are lost or want to figure out what the effect of - some command has been. - - -File: dc.info, Node: Arithmetic, Next: Stack Control, Prev: Printing Commands, Up: Top - -Arithmetic -********** - -`+' - Pops two values off the stack, adds them, and pushes the result. - The precision of the result is determined only by the values of - the arguments, and is enough to be exact. - -`-' - Pops two values, subtracts the first one popped from the second - one popped, and pushes the result. - -`*' - Pops two values, multiplies them, and pushes the result. The - number of fraction digits in the result is controlled by the - current precision flag (see below) and does not depend on the - values being multiplied. - -`/' - Pops two values, divides the second one popped from the first one - popped, and pushes the result. The number of fraction digits is - specified by the precision flag. - -`%' - Pops two values, computes the remainder of the division that the - `/' command would do, and pushes that. The division is done with - as many fraction digits as the precision flag specifies, and the - remainder is also computed with that many fraction digits. - -`^' - Pops two values and exponentiates, using the first value popped as - the exponent and the second popped as the base. The fraction part - of the exponent is ignored. The precision flag specifies the - number of fraction digits in the result. - -`v' - Pops one value, computes its square root, and pushes that. The - precision flag specifies the number of fraction digits in the - result. - - Most arithmetic operations are affected by the "precision flag", -which you can set with the `k' command. The default precision value is -zero, which means that all arithmetic except for addition and -subtraction produces integer results. - - The remainder operation (`%') requires some explanation: applied to -arguments `a' and `b' it produces `a - (b * (a / b))', where `a / b' is -computed in the current precision. - - -File: dc.info, Node: Stack Control, Next: Registers, Prev: Arithmetic, Up: Top - -Stack Control -************* - -`c' - Clears the stack, rendering it empty. - -`d' - Duplicates the value on the top of the stack, pushing another copy - of it. Thus, `4d*p' computes 4 squared and prints it. - - -File: dc.info, Node: Registers, Next: Parameters, Prev: Stack Control, Up: Top - -Registers -********* - - DC provides 128 memory registers, each named by a single ASCII -character. You can store a number in a register and retrieve it later. - -`sR' - Pop the value off the top of the stack and store it into register - R. - -`lR' - Copy the value in register R, and push it onto the stack. This - does not alter the contents of R. - - Each register also contains its own stack. The current register - value is the top of the register's stack. - -`SR' - Pop the value off the top of the (main) stack and push it onto the - stack of register R. The previous value of the register becomes - inaccessible. - -`LR' - Pop the value off the top of register R's stack and push it onto - the main stack. The previous value in register R's stack, if any, - is now accessible via the `lR' command. - - The `f' command prints a list of all registers that have contents -stored in them, together with their contents. Only the current -contents of each register (the top of its stack) is printed. - - -File: dc.info, Node: Parameters, Next: Strings, Prev: Registers, Up: Top - -Parameters -********** - - DC has three parameters that control its operation: the precision, -the input radix, and the output radix. The precision specifies the -number of fraction digits to keep in the result of most arithmetic -operations. The input radix controls the interpretation of numbers -typed in; *all* numbers typed in use this radix. The output radix is -used for printing numbers. - - The input and output radices are separate parameters; you can make -them unequal, which can be useful or confusing. Each radix must be -between 2 and 36 inclusive. The precision must be zero or greater. -The precision is always measured in decimal digits, regardless of the -current input or output radix. - -`i' - Pops the value off the top of the stack and uses it to set the - input radix. - -`o' -`k' - Similarly set the output radix and the precision. - -`I' - Pushes the current input radix on the stack. - -`O' -`K' - Similarly push the current output radix and the current precision. - - -File: dc.info, Node: Strings, Next: Status Inquiry, Prev: Parameters, Up: Top - -Strings -******* - - DC can operate on strings as well as on numbers. The only things you -can do with strings are print them and execute them as macros (which -means that the contents of the string are processed as DC commands). -Both registers and the stack can hold strings, and DC always knows -whether any given object is a string or a number. Some commands such as -arithmetic operations demand numbers as arguments and print errors if -given strings. Other commands can accept either a number or a string; -for example, the `p' command can accept either and prints the object -according to its type. - -`[CHARACTERS]' - Makes a string containing CHARACTERS and pushes it on the stack. - For example, `[foo]P' prints the characters `foo' (with no - newline). - -`x' - Pops a value off the stack and executes it as a macro. Normally - it should be a string; if it is a number, it is simply pushed back - onto the stack. For example, `[1p]x' executes the macro `1p', - which pushes 1 on the stack and prints `1' on a separate line. - - Macros are most often stored in registers; `[1p]sa' stores a macro - to print `1' into register `a', and `lax' invokes the macro. - -`>R' - Pops two values off the stack and compares them assuming they are - numbers, executing the contents of register R as a macro if the - original top-of-stack is greater. Thus, `1 2>a' will invoke - register `a''s contents and `2 1>a' will not. - -`<R' - Similar but invokes the macro if the original top-of-stack is less. - -`=R' - Similar but invokes the macro if the two numbers popped are equal. - This can also be validly used to compare two strings for equality. - -`?' - Reads a line from the terminal and executes it. This command - allows a macro to request input from the user. - -`q' - During the execution of a macro, this comand does not exit DC. - Instead, it exits from that macro and also from the macro which - invoked it (if any). - -`Q' - Pops a value off the stack and uses it as a count of levels of - macro execution to be exited. Thus, `3Q' exits three levels. - - -File: dc.info, Node: Status Inquiry, Next: Notes, Prev: Strings, Up: Top - -Status Inquiry -************** - -`Z' - Pops a value off the stack, calculates the number of digits it has - (or number of characters, if it is a string) and pushes that - number. - -`X' - Pops a value off the stack, calculates the number of fraction - digits it has, and pushes that number. For a string, the value - pushed is -1. - -`z' - Pushes the current stack depth; the number of objects on the stack - before the execution of the `z' command. - -`I' - Pushes the current value of the input radix. - -`O' - Pushes the current value of the output radix. - -`K' - Pushes the current value of the precision. - - -File: dc.info, Node: Notes, Prev: Status Inquiry, Up: Top - -Notes -***** - - The `:' and `;' commands of the Unix DC program are not supported, -as the documentation does not say what they do. The `!' command is not -supported, but will be supported as soon as a library for executing a -line as a command exists. - - - -Tag Table: -Node: Top960 -Node: Introduction1440 -Node: Printing Commands2603 -Node: Arithmetic3211 -Node: Stack Control5168 -Node: Registers5468 -Node: Parameters6586 -Node: Strings7659 -Node: Status Inquiry9857 -Node: Notes10571 - -End Tag Table |
