Create alternating-characters solution

Author: omonimus1

problem-solving/alternating-characters.cpp

@@ -0,0 +1,16 @@
+// https://www.hackerrank.com/challenges/alternating-characters/problem
+int alternatingCharacters(string s) {
+    int len = s.size();
+    if(len <=1 )
+        return 0; 
+
+    int solution = 0;
+
+    for(int i =0; i< len-1; i++)
+    {
+         if(s[i] == s[i+1])
+            solution+=1; 
+    }
+    return solution; 
+
+}