Add root_to_string function to enable printing of roots.

1 files changed, 6 insertions, 0 deletions

diff --git a/double-error.c b/double-error.c
index 06d27ae..d5bac3d 100644
--- a/double-error.c
+++ b/double-error.c
@@ -108,3 +108,9 @@ double_error power(double_error de, double_error p) {
 }
 
 double to_double(double_error de){ return de.v; }
+
+bool root_to_string(char* s, double_error de, double_error p){
+	double_error de1p = power(de,ratio(convert_int(1),p));
+	to_string(s,de1p);
+	return true;
+}