Create number-of-segments-in-a-string.cpp

Author: kamyu104

C++/number-of-segments-in-a-string.cpp

@@ -0,0 +1,15 @@
+// Time:  O(n)
+// Space: O(1)
+
+class Solution {
+public:
+    int countSegments(string s) {
+        int result = static_cast<int>(!s.empty() && s.back() != ' ');
+        for (int i = 1; i < s.size(); ++i) {
+            if (s[i] == ' ' && s[i - 1] != ' ') {
+                ++result;
+            }
+        }
+        return result;
+    }
+};