3 files changed, 81 insertions, 0 deletions
diff --git a/Code/Shell/func_abc.sh b/Code/Shell/func_abc.sh
new file mode 100755
index 0000000..b44ce57
--- /dev/null
+++ b/Code/Shell/func_abc.sh
@@ -0,0 +1,23 @@
+#!./sh
+
+func_c()
+{
+	echo "Function C"
+	sleep 1
+}
+
+func_b()
+{
+	echo "Function B"
+	sleep 1
+	func_c
+}
+
+func_a()
+{
+	echo "Function A"
+	sleep 1
+	func_b
+}
+
+func_a
diff --git a/Code/Shell/func_slow.sh b/Code/Shell/func_slow.sh
new file mode 100755
index 0000000..3407646
--- /dev/null
+++ b/Code/Shell/func_slow.sh
@@ -0,0 +1,35 @@
+#!./sh
+
+func_c()
+{
+	echo "Function C"
+	i=0
+	while [ $i -lt 300 ]
+	do
+		i=`expr $i + 1`
+	done
+}
+
+func_b()
+{
+	echo "Function B"
+	i=0
+	while [ $i -lt 200 ]
+	do
+		i=`expr $i + 1`
+	done
+	func_c
+}
+
+func_a()
+{
+	echo "Function A"
+	i=0
+	while [ $i -lt 100 ]
+	do
+		i=`expr $i + 1`
+	done
+	func_b
+}
+
+func_a
diff --git a/Code/Shell/func_waste.sh b/Code/Shell/func_waste.sh
new file mode 100755
index 0000000..bfeeecb
--- /dev/null
+++ b/Code/Shell/func_waste.sh
@@ -0,0 +1,23 @@
+#!./sh
+
+func_c()
+{
+	/usr/bin/echo "Function C"
+	sleep 1
+}
+
+func_b()
+{
+	/usr/bin/echo "Function B"
+	sleep 1
+	func_c
+}
+
+func_a()
+{
+	/usr/bin/echo "Function A"
+	sleep 1
+	func_b
+}
+
+func_a