Define safe sums and products and finish exact version.

1 files changed, 4 insertions, 1 deletions

diff --git a/ratio.h b/ratio.h
index 26ed1c2..bd6a1c7 100644
--- a/ratio.h
+++ b/ratio.h
@@ -2,7 +2,7 @@
 #include <stdlib.h>
 #include <math.h>
 
-typedef struct {long int n; long unsigned int d}rational;
+typedef struct {bool s; unsigned long long n; unsigned long long d}rational;
 
 rational convert_int(int);
 
@@ -20,4 +20,7 @@ rational absolute(rational);
 
 rational power(rational,unsigned int);
 
+
 double to_double(rational);
+
+bool to_string(char*,rational r);