Cannot match string from information parsed from a file

I am trying to understand what is happening here, I made this from the program I am working on to show what is happening. The strings pulled from the text file don't match when I compare them to string. But hard coded data will.

this program should be showing:

failed again
failed again
success
success

but is does not, it fails to match the first instance of a55555555. I have found that this only happens on information I pull from the file, so I figure I must be doing something wrong during the import but I can find what. actual output:

failed again
failed again
failed again
success

the file(student.txt):

a22222222
a11111111
a55555555

the code:

#include <vector>
#include <iostream>
#include <fstream>
using namespace std;

class Student {
    public:
        void display(ostream& os) const;
        void setId(string);
        string getId();     
    private:
        string id_;
};

void Student::setId(string id) {
    id_ = id;
}

string Student::getId() {
    return id_;
}


int main () {

    vector <Student> vStudent;
    int count = 0;
    string line;
    ifstream infile("student.txt");

    while (getline(infile, line)) {
        vStudent.push_back(Student());
        vStudent[count].setId(line);
        count++;
    }

    vStudent.push_back(Student());
    vStudent[count].setId("a55555555");

    string test = "a55555555";
    for (auto & element : vStudent) {
        if (test == element.getId())
            cout << "success" << endl;
        else
            cout << "failed again" << endl;
    }   
}