10_largest_word_in_a_sentence.cpp

#include<iostream>
using namespace std;

// char arr[n+1] is not standard C++.

int main()
{

    int n;
    cin>>n;
    cin.ignore();

    char arr[n+1];
    cin.getline(arr,n+1);
    cin.ignore();

    int i=0;
    int currLen=0; int maxLen=0;
    int st=0;      int maxst=0;

    while(1)
    {
        if(arr[i]==' ' || arr[i]=='\0')
        {
            if(currLen>maxLen)
            {
                maxLen=currLen;
                maxst=st;
            }
            currLen=0;
            st=i+1;
        }
        else
        {
            currLen++;
        }

        if(arr[i]=='\0')
        {
            break;
        }
        i++;
    }
    cout<<maxLen<<endl;
    
    for(int i=0;i<maxLen;i++)
    {
        cout<<arr[i+maxst];
    }

    return 0;
}