Ensure that the first digit of a randomly generated BigInt is non-zero

closes #40
faheel · Jun 2, 2019 · f1fb18d · f1fb18d
1 parent 5e3a130
commit f1fb18d
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/include/functions/random.hpp b/include/functions/random.hpp
@@ -32,6 +32,10 @@ BigInt big_random(size_t num_digits = 0) {
 
     BigInt big_rand;
     big_rand.value = "";    // clear value to append digits
+
+    // ensure that the first digit is non-zero
+    big_rand.value += std::to_string(1 + rand_generator() % 9);
+
     while (big_rand.value.size() < num_digits)
         big_rand.value += std::to_string(rand_generator());
     if (big_rand.value.size() != num_digits)