1. redirection
Okay this is about redirection , from the dos command line or through
a system( ) type call ; the two being essentially the same I hope.
system("afile.* > bfile.*",2) for instance appears to transfer [ command
line ? ] data to bfile.* from afile.* .
What of double re-direction though , afile.* < > bfile.* , from within
a system() call or the operator ; afile.* >> bfile.* , again from within
a system call ?
How is data transferred to bfile.* from afile.* , when using redirection,
is the disk used or is the RAM , what exactly is the mechanism involved.
I wish to use command line parameters and redirection to :
1. Generate data within an external u4.ex , from a system()
call from another file hed.ex or hed.exe .
---------. .---------.
| hed1.* |=========>| u4.ex |
| | system() | |
.---------' ;---------'
2. Redirect the data , generated within u4.ex , to another
file , to be read by hed1.* ; or if possible return
[ redirect ] the data from u4.ex to hed1.*.
I wish to keep disk activity to a minimum and get hed1.* to do most of
the data manipulation.
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