每日一题：按键变更的次数

countKeyChanges.cpp

@@ -0,0 +1,25 @@
+#include <iostream>
+#include <string>
+using namespace std;
+
+class Solution {
+public:
+    int countKeyChanges(string s) {
+        int toReturn = 0;
+        for(int i = 0; i< s.size()-1 ;i++){
+            if((s[i] == s[i+1]) or (s[i] == s[i+1] - 32) or (s[i] == s[i+1] + 32)){
+                continue;
+            }
+            else{
+                toReturn++;
+            }
+        }
+        return toReturn;
+    }
+};
+
+int main(){
+    Solution s;
+    cout << s.countKeyChanges("aAbBcC") << endl;
+    return 0;
+}