Проблема с перегрузкой операторов '-' >> << и с конструктором без параметров

#pragma once
#include <iostream>
#include <string>
#include <fstream>
using namespace std;
 
class Line
{
private:
 
    char *Line1;
    int length;
 
public:
 
    Line()
    {
        Line1 [length] = '\0';
    }
 
    Line(char* L1)
    {
        Line1 = new char[strlen(L1)];
        strcpy(Line1, L1);
        length = strlen(Line1);
    }
 
    // friend ostream& operator << (ostream& out, Line& lin);
    // friend istream & operator >> (istream & in, Line &lin);
    // Line operator - (char letter);
 
    int CountWordsInLine()
    {
        int Count=0;
        for(int i=0; i<length; i++)
        {
            if (Line1[i]=='_')
                Count++;
        }
        Count++;
        return Count;
    }
 
    char* ReverseLine()
    {
        for (int i=0; i<=(length-1)/2; i++)
        {
            char temp = Line1[i];
            Line1[i] = Line1[length-i-1];
            Line1[length-i-1] = temp;
        }
        return Line1;
    }
 
    void Print()
    {
        cout << Line1 << endl;
    }
 
    Line operator - (char letter)
    {
        char *temp = new char[length];
        for (int i=0; i<length; i++)
        {
            if (Line1[i]!= letter)
                temp[i] = Line1[i];
            temp[i]='\0';
        }
        strcpy(Line1, temp);
        for (int i=0; i<length; i++)
            delete [] temp;
        return Line1;
    }
 
    istream & operator >> (istream & in)
    {
        in >> Line1 >> endl;
        return in;
    }
 
    ostream& operator << (ostream& out)
    {
        out << Line1;
        return out;
    }
};
 
#pragma once
#include "Class.h"
 
int main()
{
    Line ln1("Hello_Russia");
    cout << "normal sentece: ";
    Line ln2;
    cin >> ln2 >> endl;
    Line lin = ln2 - 'l';
    cout << "without delete letters: " << lin;
 
    Line lnx1 = ln1.CountWordsInLine();
    cout << "number of words: ";
    lnx1.Print();
 
    Line lnx2 = ln1.ReverseLine();
    cout << "reversed sentence: ";
    lnx2.Print();
 
    return 0;
}

ostream& operator << (ostream& out
{
    out << Line1;
    return out;
}

#pragma once
#include <iostream>
#include <cstring>
using namespace std;
 
class Line
{
private:
 
    char *Line1;
    int length;
 
public:
 
    Line()
    {
        length = 1;
        Line1 = new char[length];
        Line1[length-1] = '\0';
    }
 
    Line(const char* L1)
    {
        length = strlen(L1)+1;
        Line1 = new char[length];
        strcpy(Line1, L1);
        Line1[length-1] = '\0';
    }
 
    friend ostream& operator << (ostream& out, const Line& l);
    friend istream& operator >> (istream & in, Line &l);
 
    Line operator - (char letter)
    {
        char *temp = new char[length];
        int i,j;
        for (i=0, j=0; i<length; i++)
            if (Line1[i] != letter)
            {
                temp[j] = Line1[i];
                j++;
            }
        length = strlen(temp)+1;
        temp[length-1] = '\0';
        strcpy(Line1, temp);
        return Line1;
    }
 
    ~Line()
    {
        delete [] Line1;
    }
};
istream & operator >> (istream & in, Line& l)
{
    char *temper = new char[100];
    in >> temper;
    l.length = strlen(temper)+1;
    temper[l.length-1] = '\0';
    l.Line1 = new char[l.length];
    strcpy(l.Line1, temper);
    l.Line1[l.length-1] = '\0';
    return in;
}
 
ostream& operator << (ostream& out, const Line& l)
{
    return out << l.Line1;
}
 
int main()
{
    Line ln1;
    cin >> ln1;
    cout << "normal sentece: " << ln1 << endl;
    Line ln2;
    ln2 = ln1 - 'u';
    cout << "without letter: " << ln2 << endl;
 
    return 0;
}

Line operator - (char letter)
{
    char *temp = new char[length];
    int i,j;
    for (i=0, j=0; i<length; i++)
        if (Line1[i] != letter)
        {
            temp[j] = Line1[i];
            j++;
        }
    length = strlen(temp)+1;
    temp[length-1] = '\0';
    strcpy(Line1, temp);
    return Line1;
}