Create LenghtOfLastWord.cpp

cpp_codes/LenghtOfLastWord.cpp

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+Problem Description : 
+
+    Given a string s consists of upper/lower-case alphabets and empty space characters ' ', return the length of last word in the string.
+
+    If the last word does not exist, return 0.
+
+    Note: A word is defined as a character sequence consists of non-space characters only.
+
+
+Solution :
+
+
+int Solution::lengthOfLastWord(const string A) {
+    int n = A.length();
+    int ans = 0, i = n-1;
+
+    while(i >= 0){
+        if(A[i] == ' ') i--;
+        else break;
+    }
+
+    for(; i >= 0; i--){
+        if(A[i] == ' ') break;
+        ans++;
+    }
+
+    return ans;
+}