diff --git a/text.h b/text.h
new file mode 100644
index 0000000..693c22a
--- /dev/null
+++ b/text.h
@@ -0,0 +1,8 @@
+#ifndef TEXT_H_INCLUDED
+#define TEXT_H_INCLUDED
+#include <vector>
+
+void
+show_histogram_text (const std::vector<double>& bins,size_t MAX_ASTERISK, size_t bin_count);
+
+#endif // TEXT_H_INCLUDED