C5_STORE

STORE*
 Assign a value to one or more variables
------------------------------------------------------------------------------
 Syntax

     STORE <exp> TO <idVar list>
     <idVar> = <exp>
     <idVar> := [ <idVar2> := ...] <exp>

 Arguments

     <exp> is a value of any data type that is assigned to the specified
     variables.

     TO <idVar list> defines a list of one or more local, static, public,
     private, or field variables that are assigned the value <exp>.  If any
     <idVar> is not visible or does not exist, a private variable is created
     and assigned <exp>.

 Description

     STORE assigns a value to one or more variables of any storage class.
     The storage classes of Clipper variables are local, static, field,
     private, and public.  STORE is identical to the simple assignment
     operators (=) and (:=).  In fact, a STORE statement is preprocessed into
     an assignment statement using the inline operator (:=).  Like all of the
     assignment operators, STORE assigns to the most recently declared and
     visible variable referenced by <idVar>.  If, however, the variable
     reference is ambiguous (i.e., not declared at compile time or not
     explicitly qualified with an alias), it is assumed to be MEMVAR.  At
     runtime, if no private or public variable exists with the specified
     name, a private variable is created.

     To override a declaration, you can specify the <idVar> prefaced by an
     alias.  If <idVar> is a field variable, use the name of the work area.
     For private and public variables, you can use the memory variable alias
     (MEMVAR->).  To assign to a field variable in the currently selected
     work area (as opposed to a particular named work area), you can use the
     field alias (FIELD->).

     As a matter of principle, all variables other than field variables
     should be declared.  Preface field variables with the alias.  Use of
     private and public variables is discouraged since they violate basic
     principles of modular programming and are much slower than local and
     static variables.

     Note that the STORE command is a compatibility command and not
     recommended for any assignment operation.  Clipper provides
     assignment operators that supersede the STORE command, including the
     inline assignment operator (:=), the increment and decrement operators
     (++) and (--), and the compound assignment operators (+=, -=, *=, /=).
     Refer to the Operators and Variables sections of the "Basic Concepts"
     chapter in the Programming and Utilities Guide for more information.

 Notes

     .  Assigning a value to an entire array: In Clipper, neither
        the STORE command nor the assignment operators can assign a single
        value to an entire array.  Use the AFILL() function for this purpose.

     .  Memo fields: Assigning a memo field to a variable assigns a
        character value to that variable.

 Examples

     .  These statements create and assign values to undeclared
        private variables:

        STORE "string" TO cVar1, cVar2, cVar3
        cVar1:= "string2"
        cVar2:= MEMVAR->cVar1

     .  These statements assign multiple variables using both STORE
        and the inline assignment operator (:=).  The methods produce
        identical code:

        STORE "value" to cVar1, cVar2, cVar3
        cVar1 := cVar2 := cVar3 := "value"

     .  These statements assign values to the same field referenced
        explicitly with an alias.  The first assignment uses the field alias
        (FIELD->), where the second uses the actual alias name:

        USE Sales NEW
        FIELD->CustBal = 1200.98
        Sales->CustBal = 1200.98

 Files   Library is CLIPPER.LIB.

See Also: AFILL() LOCAL PRIVATE PUBLIC RELEASE REPLACE



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C5 Commands

 ?|??            Display one or more values to the console
 @...BOX         Draw a box on the screen
 @...CLEAR       Clear a rectangular region of the screen
 @...GET         Create a new Get object and display it
 @...PROMPT      Paint a menu item and define a message
 @...SAY         Display data at a specified screen or printer row and column
 @...TO          Draw a single- or double-line box
 ACCEPT*         Place keyboard input into a memory variable
 APPEND BLANK    Add a new record to the current database file
 APPEND FROM     Import records from a database (.dbf) file or ASCII text file
 AVERAGE         Average numeric expressions in the current work area
 CALL*           Execute a C or Assembler procedure
 CANCEL*         Terminate program processing
 CLEAR ALL*      Close files and release public and private variables
 CLEAR GETS      Release Get objects from the current GetList array
 CLEAR MEMORY    Release all public and private variables
 CLEAR SCREEN    Clear the screen and return the cursor home
 CLEAR TYPEAHEAD Empty the keyboard buffer
 CLOSE           Close a specific set of files
 COMMIT          Perform a solid-disk write for all active work areas
 CONTINUE        Resume a pending LOCATE
 COPY FILE       Copy a file to a new file or to a device
 COPY STRUCTURE  Copy the current .dbf structure to a new database (.dbf) file
 COPY STRU EXTE  Copy field definitions to a .dbf file
 COPY TO         Export records to a database (.dbf) file or ASCII text file
 COUNT           Tally records to a variable
 CREATE          Create an empty structure extended (.dbf) file
 CREATE FROM     Create a new .dbf file from a structure extended file
 DELETE          Mark records for deletion
 DELETE FILE     Remove a file from disk
 DELETE TAG      Delete a tag
 DIR*            Display a listing of files from a specified path
 DISPLAY         Display records to the console
 EJECT           Advance the printhead to top of form
 ERASE           Remove a file from disk
 FIND*           Search an index for a specified key value
 GO              Move the pointer to the specified identity
 INDEX           Create an index file
 INPUT*          Enter the result of an expression into a variable
 JOIN            Create a new database file by merging from two work areas
 KEYBOARD        Stuff a string into the keyboard buffer
 LABEL FORM      Display labels to the console
 LIST            List records to the console
 LOCATE          Search sequentially for a record matching a condition
 MENU TO         Execute a lightbar menu for defined PROMPTs
 NOTE*           Place a single-line comment in a program file
 PACK            Remove deleted records from a database file
 QUIT            Terminate program processing
 READ            Activate full-screen editing mode using Get objects
 RECALL          Restore records marked for deletion
 REINDEX         Rebuild open indexes in the current work area
 RELEASE         Delete public and private memory variables
 RENAME          Change the name of a file
 REPLACE         Assign new values to field variables
 REPORT FORM     Display a report to the console
 RESTORE         Retrieve memory variables from a memory (.mem) file
 RESTORE SCREEN* Display a saved screen
 RUN             Execute a DOS command or program
 SAVE            Save variables to a memory (.mem) file
 SAVE SCREEN*    Save the current screen to a buffer or variable
 SEEK            Search an order for a specified key value
 SELECT          Change the current work area
 SET ALTERNATE   Echo console output to a text file
 SET BELL        Toggle sounding of the bell during full-screen operations
 SET CENTURY     Modify the date format to include or omit century digits
 SET COLOR*      Define screen colors
 SET CONFIRM     Toggle required exit key to terminate GETs
 SET CONSOLE     Toggle console display to the screen
 SET CURSOR      Toggle the screen cursor on or off
 SET DATE        Set the date format for input and display
 SET DECIMALS    Set the number of decimal places to be displayed
 SET DEFAULT     Set the CA-Clipper default drive and directory
 SET DELETED     Toggle filtering of deleted records
 SET DELIMITERS  Toggle or define GET delimiters
 SET DESCENDING  Change the descending flag of the controlling order
 SET DEVICE      Direct @...SAYs to the screen or printer
 SET EPOCH       Control the interpretation of dates with no century digits
 SET ESCAPE      Toggle Esc as a READ exit key
 SET EXACT*      Toggle exact matches for character strings
 SET EXCLUSIVE*  Establish shared or exclusive USE of database files
 SET FILTER      Hide records not meeting a condition
 SET FIXED       Toggle fixing of the number of decimal digits displayed
 SET FORMAT*     Activate a format when READ is executed
 SET FUNCTION    Assign a character string to a function key
 SET INDEX       Open one or more order bags in the current work area
 SET INTENSITY   Toggle enhanced display of GETs and PROMPTs
 SET KEY         Assign a procedure invocation to a key
 SET MARGIN      Set the page offset for all printed output
 SET MEMOBLOCK   Change the block size for memo files
 SET MESSAGE     Set the @...PROMPT message line row
 SET OPTIMIZE    Change the setting that optimizes using open orders
 SET ORDER       Select the controlling order
 SET PATH        Specify the CA-Clipper search path for opening files
 SET PRINTER     Toggle echo of output to printer or set the print destination
 SET PROCEDURE*  Compile procedures and functions into the current object file
 SET RELATION    Relate two work areas by a key value or record number
 SET SCOPE       Change the boundaries for scoping keys in controlling order
 SET SCOPEBOTTOM Change bottom boundary for scoping keys in controlling order
 SET SCOPETOP    Change top boundary for scoping keys in controlling order
 SET SCOREBOARD  Toggle the message display from READ or MEMOEDIT()
 SET SOFTSEEK    Toggle relative seeking
 SET TYPEAHEAD   Set the size of the keyboard buffer
 SET UNIQUE*     Toggle inclusion of non-unique keys into an index
 SET WRAP*       Toggle wrapping of the highlight in menus
 SKIP            Move the record pointer to a new position
 SORT            Copy to a database (.dbf) file in sorted order
 STORE*          Assign a value to one or more variables
 SUM             Sum numeric expressions and assign results to variables
 TEXT*           Display a literal block of text
 TOTAL           Summarize records by key value to a database (.dbf) file
 TYPE            Display the contents of a text file
 UNLOCK          Release file/record locks set by the current user
 UPDATE          Update current database file from another database file
 USE             Open an existing database (.dbf) and its associated files
 WAIT*           Suspend program processing until a key is pressed
 ZAP             Remove all records from the current database file

 

= Simple assign

 = (assign)
 Simple assign--binary                           (Assignment)
------------------------------------------------------------------------------
 Syntax

     <idVar> = <exp>

 Type

     All

 Operands

     <idVar> is a valid variable identifier of any storage class,
     including a field variable.  If <idVar> is not visible or does not
     exist, a private variable is created and assigned the result of <exp>.

     <exp> is the expression whose result is assigned to <idVar>.

 Description

     The simple assignment operator (=) assigns a value to a variable.  It is
     identical in operation to the STORE command that initializes a single
     variable and must be specified as a program statement.  The inline
     assignment operator (:=) is like the = operator except that you can
     specify it within expressions.  If you specify the simple assign
     operator (=) within an expression, it is interpreted as the equality (=)
     operator.

     Note:  You cannot initialize a specific variable using the simple
     assign operator (=) in a declaration statement.  Only the inline assign
     (:=) operator can be used for this purpose.

     If the reference to <idVar> is ambiguous (i.e., not declared at compile
     time and not explicitly qualified with an alias), <idVar> is always
     assumed to be MEMVAR.  At runtime, if no private or public variable
     exists with the specified name, a private variable is created.  To
     assign a field variable with the = operator, you must declare the field
     variable name in a FIELD statement or refer to the field name prefaced
     by the FIELD-> alias or the name of the work area.

 Examples

     .  These examples are valid simple assignment statements:

        nValue = 25
        nNewValue = SQRT(nValue) ** 5
        nOldValue = nValue

     .  In this example, the two lines are equivalent:

        FIELD->CustAge = 20
        REPLACE CustAge WITH 20

See Also: ++ — := = (compound) STORE*

 

The Clipper conversion process

The Clipper conversion process (.pdf)

Try these new 5.01 language constructs

Try these new 5.01 language constructs

C5 Variable Handling Commands

ACCEPT :

Place keyboard input into a memory variable

ACCEPT [<expPrompt>] TO <idVar>

CLEAR ALL* :

Close files and release public and private variables

CLEAR ALL

CLEAR MEMORY :

Release all public and private variables

CLEAR MEMORY

DECLARE* :

Create and initialize private memory variables and arrays

DECLARE <identifier> [[:= <initializer>], ... ]

FIELD :

Declare database field names

FIELD <idField list> [IN <idAlias>]

INPUT :

Enter the result of an expression into a variable

INPUT [<expPrompt>] TO <idVar>

LOCAL :

Declare and initialize local variables and arrays

LOCAL <identifier> [[:= <initializer>], ... ]

MEMVAR :

Declare private and public variable names

MEMVAR <idMemvar list>

MEMVARBLOCK() :

Return a set-get code block for a given memory variable

MEMVARBLOCK(<cMemvarName>) --> bMemvarBlock

PARAMETERS :

Create private parameter variables

PARAMETERS <idPrivate list>

PRIVATE :

Create and initialize private memory variables and arrays

PRIVATE <identifier> [[:= <initializer>], ... ]

PUBLIC :

Create and initialize public memory variables and arrays

PUBLIC <identifier> [[:= <initializer>], ... ]

RELEASE :

Delete public and private memory variables

RELEASE <idMemvar list>
RELEASE ALL [LIKE | EXCEPT <skeleton>]

RESTORE :

Retrieve memory variables from a memory (.mem) file

RESTORE FROM <xcMemFile> [ADDITIVE]

SAVE :

Save variables to a memory (.mem) file

SAVE TO <xcMemFile> [ALL [LIKE | EXCEPT <skeleton>]]

STATIC :

Declare and initialize static variables and arrays

STATIC <identifier> [[:= <initializer>], ... ]

STORE* :

Assign a value to one or more variables

STORE <exp> TO <idVar list>
<idVar> = <exp>
<idVar> := [ <idVar2> := ...] <exp>