Ignore Spaces Using getline in C++ Palindrome homework

Question

I am trying to skip the spaces in my code using getline();

I think I solved the spacing problem, but I'm trying to make the code check from the beginning of the word and the end of the word at the same time, so that when I type sentences like "ufo tofu" it will come back as a palindrome.

I've tried removing the spaces, but it only causes the system to return me an error.

#include <iostream>
#include <string>
#include <cctype>
using namespace std;

int main() {
    string userInput;
    int startInput;
    int endInput;
    bool isPalindrome = true;

    startInput = userInput.length();

    getline (cin, userInput);
    cin.ignore();

    for (int i = 0; i<(startInput/2); i++){
        if (userInput[i] != userInput[(startInput -1) -i])
            isPalindrome = false;
    }

    if (isPalindrome){
        cout << userInput << " is a palindrome" << endl;
    }
    else {
        cout << userInput << " is not a palindrome" << endl;
    }

    return 0;
}

I am trying to make the output come back as "is not a palindrome" when I submit my code to be graded.

These are the two errors that are coming back;

4: Compare output
0 / 2
Output differs. See highlights below. 
Special character legend
Input
statistics
Your output
statistics is a palindrome
Expected output
statistics is not a palindrome


6: Compare output
0 / 2
Output differs. See highlights below. 
Special character legend
Input
evil is alive
Your output
evil is alive is a palindrome
Expected output
evil is alive is not a palindrome

Answer 1

string s;
do {
    getline(cin, s);
}while(s.empty());
s.erase((remove(s.begin(),s.end(),' ')),s.end());
cout<<s<<endl;

Let's say your string s is ufo tofu . It will after erasing all spaces become ufotofu . That way you can easily check if it's palindrome or not.

How does this thing work ?

1. Well we declare a string called s . In that string, we will store our ufo tofu input.
2. We use do-while loop to input our "sentence" into a string. We could use just getline(cin, s); , but if you pressed enter-key once, it would stop your program.
3. Next thing, we use function combination of functions remove and erase : As the beginning parameter we use function remove , which finds all the spaces in the string, pushes them to the end of the container (in our case string s ), and returns beginning iterator of that "pushing", and the second parameter tells us to remove every single element of container from that beginning iterator to the end.
4. We just print out the string, but now without spaces!

I think this is really simple way to do it, but if it can't be useful to you, I am sorry for wasting your time reading all of this! :)