1 files changed, 5 insertions, 2 deletions
diff --git a/sum1.awk b/sum1.awk
index 61d96e0..8f1419b 100644
--- a/sum1.awk
+++ b/sum1.awk
@@ -5,11 +5,13 @@
 # output: sum of each column
 #   missing entries are treated as zeros
 
+BEGIN { OFS = FS }
+
 {
-    for (i=1; i<=NF; i++)
-        sum[i] += $i
     if (NF > nf_max)
         nf_max = NF
+    for (i=1; i<=NF; i++)
+        sum[i] += $i
 }
 
 END {
@@ -18,3 +20,4 @@ END {
         printf((i < nf_max) ? OFS : ORS)
     }
 }
+