diff -r 1b434e6cc405 -r b810a07248a0 src/lemon/graph_writer.h
--- a/src/lemon/graph_writer.h	Wed Apr 06 08:14:16 2005 +0000
+++ b/src/lemon/graph_writer.h	Wed Apr 06 17:19:54 2005 +0000
@@ -82,7 +82,7 @@
     void write(std::ostream& os, const std::string& value) {
       os << "\"";
       if (escaped) {
-	ostringstream ls;
+	std::ostringstream ls;
 	for (int i = 0; i < (int)value.size(); ++i) {
 	  writeEscape(ls, value[i]);
 	}
@@ -132,7 +132,7 @@
 	return;
       default:
 	if (c < 0x20) {
-	  os << '\\' << oct << (int)c;
+	  os << '\\' << std::oct << (int)c;
 	} else {
 	  os << c;
 	}