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 QuickSCREEN Details Example Contents Index |
| ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ |
| LSET Statement Details |
|
| Syntax |
| LSET {stringvariable=stringexpression | stringexpression1=stringexpression2} |
| |
| The stringvariable is usually a random-access file field defined in a FIELD |
| statement, although it can be any string variable. The stringexpression |
| is the value assigned to the variable. |
| |
| If stringexpression requires fewer bytes than were defined for |
| stringvariable in the FIELD statement, the LSET function left-justifies |
| the string in the field (RSET will right-justify the string). Spaces are |
| used to pad the extra positions. If the string is too long for the field, |
| both LSET and RSET truncate characters from the right. Numeric values must |
| be converted to strings before they are justified with the LSET or RSET |
| statements. |
| |
| You may also use LSET or RSET with a string variable not defined in a FIELD |
| statement to left-justify or right-justify a string in a given field. For |
| example, the program lines |
| |
| A$=SPACE$(20) |
| RSET A$=N$ |
| |
| will right-justify the string N$ in a 20-character field. This can be |
| useful for formatting printed output. |
| |
| You can use LSET to assign one record variable to another. The following |
| example copies the contents of RecTwo to RecOne: |
| |
| TYPE TwoString |
| StrFld AS STRING * 2 |
| END TYPE |
| |
| TYPE ThreeString |
| StrFld AS STRING * 3 |
| END TYPE |
| DIM RecOne AS TwoString, RecTwo AS ThreeString |
| . |
| . |
| . |
| LSET RecOne = RecTwo |
| |
| Notice that LSET is used to assign record variables of differing types. |
| Record variables of the same type can be assigned using LET. Also, because |
| RecOne is only two bytes long, only two bytes are copied from RecTwo. |
| LSET copies only the number of bytes in the shorter of the two record |
| variables. |
| |
