Add root_to_string function to enable printing of roots.

1 files changed, 7 insertions, 1 deletions

diff --git a/ratio.c b/ratio.c
index 07a28ce..3b38ea7 100644
--- a/ratio.c
+++ b/ratio.c
@@ -127,8 +127,14 @@ double to_double(rational r){
 	return i*((double)r.n)/((double)r.d);
 }
 
-bool to_string(char* s,rational r){
+bool to_string(char* s, rational r){
 	double f = to_double(r);
 	sprintf(s,"%llu / %llu = %f +/- %6.1e",r.n,r.d,f,f*DBL_EPSILON);
 	return true;
 }
+
+bool root_to_string(char* s, rational r, unsigned int p){
+	double f = pow(to_double(r),1.0/p);
+	sprintf(s,"(%llu / %llu)^1/%i = %f +/- %6.1e",r.n,r.d,p,f,2*DBL_EPSILON*f);
+	return true;
+}