1 files changed, 33 insertions, 0 deletions
diff --git a/bin/problem-6.sh b/bin/problem-6.sh
new file mode 100755
index 0000000..e868c90
--- /dev/null
+++ b/bin/problem-6.sh
@@ -0,0 +1,33 @@
+#!/bin/sh
+
+validate_input() {
+  invalid=0
+  regex='^[0-9]+$'
+
+  for i in "$@"; do
+    if ! [[ $i =~ $regex ]]; then
+      echo "error: \"$i\" is not a number" >&2
+      invalid=1
+    fi
+  done
+
+  if [ $invalid -eq 1 ]; then
+    exit 1
+  fi
+}
+
+print_results() {
+  sum=0
+
+  printf "squares:"
+  for i in "$@"; do
+    sum=$((sum + $i))
+    printf " $(($i * $i))"
+  done
+  printf "\n"
+  echo "sum: $sum"
+}
+
+validate_input $@
+print_results $@
+exit 0