Length of Last Word in C++

Suppose we have a string s. s can hold any English letters and white-spaces. We have to find the length of last word in the string. If there is no last word, then return 0.

So, if the input is like "I love Programming", then the output will be 11

To solve this, we will follow these steps −

• n := 0

• for each word temp in a string −

  • n := size of temp

• return n

Example

Let us see the following implementation to get a better understanding −

 Live Demo

#include <bits/stdc++.h>
using namespace std;
class Solution {
public:
   int lengthOfLastWord(string s){
      stringstream str(s);
      string temp;
      int n = 0;
      while (str >> temp)
         n = temp.size();
      return n;
   }
};
main(){
   Solution ob;
   cout << (ob.lengthOfLastWord("I love Programming"));
}

Input

"I love Programming"

Output

11

Arnab Chakraborty

e

Updated on: 10-Jun-2020

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