add comments on output for the error cases

Author: Vijay-Siva

bit_manipulation/binary_and_operator.rb

@@ -1,5 +1,5 @@
 def binary_and(x, y)
-  raise 'Input must only contain positive integers' if x < 0 or x < 0
+  raise 'Input must only contain positive integers' if x < 0 or y < 0
 
   "0b" + (x & y).to_s(2)
 end
@@ -9,6 +9,7 @@ def binary_and(x, y)
 rescue => e
   puts e.message
 end
+# Input must only contain positive integers
 
 puts binary_and(1, 1)
 # 0b1

bit_manipulation/binary_count_setbits.rb

@@ -11,6 +11,7 @@ def binary_count_setbits(x)
 rescue => e
   puts e.message
 end
+# Input must be a positive integer
 
 puts binary_count_setbits(0)
 # 0

bit_manipulation/binary_count_trailing_zeroes.rb

@@ -18,6 +18,7 @@ def binary_count_trailing_zeroes(x)
 rescue => e
   puts e.message
 end
+# Input must be a positive integer
 
 puts binary_count_trailing_zeroes(0)
 # 1

bit_manipulation/binary_or_operator.rb

@@ -9,6 +9,7 @@ def binary_or(x, y)
 rescue => e
   puts e.message
 end
+# Input must only contain positive integers
 
 puts binary_or(1, 1)
 # 0b1

bit_manipulation/binary_xor_operator.rb

@@ -30,6 +30,7 @@ def binary_xor(x, y)
 rescue => e
   puts e.message
 end
+# Input must only contain positive integers
 
 puts binary_xor(1, 1)
 # 0b0

bit_manipulation/single_bit_binary_operations.rb

@@ -16,6 +16,14 @@ def set_bit(x, position)
 puts set_bit(8, 4)
 # 24
 
+begin
+  puts set_bit(8, -4)
+rescue => e
+  puts e.message
+end
+# position must be >= 0
+
+
 def clear_bit(x, position)
   raise "position must be > 0" if position < 0
 
@@ -34,6 +42,13 @@ def clear_bit(x, position)
 puts clear_bit(24, 4)
 # 8
 
+begin
+  puts clear_bit(0, -4)
+rescue => e
+  puts e.message
+end
+# position must be > 0
+
 def flip_bit(x, position)
   raise "position must be > 0" if position < 0
 
@@ -52,6 +67,13 @@ def flip_bit(x, position)
 puts flip_bit(24, 4)
 # 8
 
+begin
+  puts flip_bit(0, -4)
+rescue => e
+  puts e.message
+end
+# position must be > 0
+
 def is_bit_set(x, position)
   raise "position must be > 0" if position < 0
 
@@ -69,3 +91,10 @@ def is_bit_set(x, position)
 
 puts is_bit_set(24, 4)
 # true
+
+begin
+  puts is_bit_set(0, -4)
+rescue => e
+  puts e.message
+end
+# position must be > 0