1 files changed, 3 insertions, 1 deletions
diff --git a/sum3.awk b/sum3.awk
index bca92e3..3e4661f 100644
--- a/sum3.awk
+++ b/sum3.awk
@@ -11,7 +11,9 @@ function isnum(n) {
 }
 
 
-NR==1 {
+BEGIN { OFS = FS }
+
+NR == 1 {
     nfld = NF
     for (i=1; i<=NF; i++)
         numcol[i] = isnum($i)