added fractions and RNG::trial

src/rng.h

@@ -5,6 +5,8 @@
 #include <stdlib.h>
 #include <vector>
 
+#include "fraction.h"
+
 // Technically, you should ONLY define one rng for the entire program
 // IMPORTANT: pass all RNG objects as references
 class RNG final {
@@ -24,6 +26,8 @@ public:
         unsigned int get_init_seed() const;
         int get_curr_rand_num() const;
 
+        bool trial(fraction &psuccess);
+
         template<class T> T &get_rand_in_vector(const std::vector<T> &vec);
 };