initial import of bash 4.1

1 files changed, 21 insertions, 0 deletions

diff --git a/examples/scripts/hanoi.bash b/examples/scripts/hanoi.bash
new file mode 100644
index 0000000..c308125
--- /dev/null
+++ b/examples/scripts/hanoi.bash
@@ -0,0 +1,21 @@
+# Towers of Hanoi in bash
+#
+# cribbed from the ksh93 book, example from exercises on page 85
+#
+# Chet Ramey
+# chet@po.cwru.edu
+
+hanoi() # n from to spare
+{
+    typeset -i nm1=$1-1
+    ((nm1>0)) && hanoi $nm1 $2 $4 $3
+    echo "Move disc $2 to $3"
+    ((nm1>0)) && hanoi $nm1 $4 $3 $2
+}
+
+case $1 in
+[1-9])
+      hanoi $1 1 2 3;;
+*)    echo "${0##*/}: Argument must be from 1 to 9"
+      exit 1;;
+esac