Initial data commit

Task/Accumulator-factory/UNIX-Shell/accumulator-factory.sh

@@ -0,0 +1,18 @@
+#!/bin/sh
+accumulator() {
+	# Define a global function named $1
+	# with a global variable named ${1}_sum.
+	eval "${1}_sum=\$2"
+	eval "$1() {
+		${1}_sum=\$(echo \"(\$${1}_sum) + (\$2)\" | bc)
+		eval \"\$1=\\\$${1}_sum\"  # Provide the current sum.
+	}"
+}
+
+accumulator x 1
+x r 5
+accumulator y 3
+x r 2.3
+echo $r
+y r -3000
+echo $r