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Author: QueenieCplusplus

521a.sh

@@ -0,0 +1,54 @@
+#! /bin/bash
+# calculate-- kind of bc-alike tool
+
+ scale=2
+
+show_help()
+{
+
+	 #(a)
+  cat << EOF 
+
+    a % b ＝餘數
+    a ^ b ＝a 的 b 次方
+    l(x)x ＝10 的 x 次方
+    e(x) ＝ e 的 x 次方
+    scale N ＝小數取兩位（預設為 2）
+EOF
+
+}
+
+
+if [ $# -gt 0 ]; then
+
+	exec scriptbc "$@" #(b)
+
+fi 
+
+echo "calculate-- help or quit?"
+
+/bin/echo -n "calculate> "  #(c) /bin/echo -n ""
+
+
+while read cmd args # param is called cmd and args # (d) while read loop
+do
+
+   case  $cmd
+   in
+
+      quit | exit ) exit ;;
+      help | ? )  show_help ;;
+      scale ) scale=$args ;;
+      * ) scriptbc -p $scale "$cmd" "$args" ;; (c)
+
+   esac
+
+   /bin/echo -n "calculate> "
+
+done
+
+
+echo " "
+
+exit 0 
+