Word wrap: Difference between revisions

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 If you have both basic and extra credit solutions, show an example where the two algorithms give different results.
+=={{header|AWK}}==
+Basic word wrap.
+<lang awk>function wordwrap_paragraph(p)
+{
+  if ( length(p) < 1 ) return
+  split(p, words)
+  spaceLeft = lineWidth
+  line = words[1]
+  delete words[1]
+  for (i = 1; i <= length(words); i++) {
+    word = words[i]
+    if ( (length(word) + 1) > spaceLeft ) {
+      print line
+      line = word
+      spaceLeft = lineWidth -  length(word)
+    } else {
+      spaceLeft -= length(word) + 1
+      line = line " " word
+    }
+  }
+  print line
+}
+BEGIN {
+  lineWidth = width
+  par = ""
+}
+/^[ \t]*$/ {
+  wordwrap_paragraph(par)
+  par = ""
+}
+!/^[ \t]*$/ {
+  par = par " " $0
+}
+END {
+  wordwrap_paragraph(par)
+}</lang>
+To test it,
+<pre>
+awk -f wordwrap.awk -v width=80 &lt; text.txt
+</pre>
 =={{header|Go}}==