Tandy 1000 Basic Reference Manual page 128

Chapter 10 I BASIC Keywords
COMMON
Statement
COMMON uariabZe[,uariabZe,.
.
.I
Passes Variables to a chained program.
Both programs in the chain should contain a COMMON state-
ment. COMMON may appear anywhere in a program, but we
recommend using it at the beginning.
The same variable cannot appear in more than one COMMON
statement in a single program. The size and order of the vari-
ables must be the same in the programs being chained. To spec-
ify array variables, append
"0"
to the variable name. If you are
passing all variables, use CHAIN with the ALL option and omit
the COMMON statement.
Note: Array variables used in a COMMON statement
must have been declared in a DIM statement.
See the CHAIN statement for more information on passing
variables.
Example
9 0 D I M D ( 5 0 )
1 0 0 C O M M O N
A , E,
C , D O , G $
1 1 0
CHFI I N
" P R O G 3 " , 1 0
Line 100 passes variables A, B, C, D, and
G$
to the CHAIN
command in Line 110.
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