/usr/share/doc/bc/examples/ckbook.b is in bc 1.06.95-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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print "\nCheck book program!\n"
print " Remember, deposits are negative transactions.\n"
print " Exit by a 0 transaction.\n\n"
print "Initial balance? "; bal = read()
bal /= 1
print "\n"
while (1) {
"current balance = "; bal
"transaction? "; trans = read()
if (trans == 0) break;
bal -= trans
bal /= 1
}
quit
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