Write a c++ program in which you should create a class and four methods in it 

Method 1.  For taking input from user in it

Method 2. For checking numbers either numbers are binary or not

Method 3. For One's Complement (Convert 1 into 0 and 0 into 1)

Method 4. For Displaying 

#include <iostream>
using namespace std;
// Class Of Binary
class Binary
{
// Note Every Default Veriable in class is private
string numbers;

public:
// Declaring Functions
void read(void);
void chk_bin(void);
void ones_compliment(void);
void display(void);
}binary; // Creating Object (binary is object)

// Function Defination For Taking Input From User and Save it into File Name Binary.txt
void Binary::read()
{
cout<<"Enter Numbers To Check Where It's Binary or Not ";
cin>>numbers;
}

// Function Defination For Checking Whether Input is Binary or not
void Binary::chk_bin()
{
// Using Loop Because It will check The Number From index 0 to length of string
for (int i = 0; i < numbers.length(); i++)
{
if (numbers.at(i) != '0' && numbers.at(i) != '1')
{
cout<<"Sorry Your Enterd Number Is Not Binary\n";
break;
}
else
{
cout<<"Your Enterd Number Is Binary\n";
break;
}
}
}

// Function Defination For Convert One Into Zero And Zero Into One
void Binary::ones_compliment()
{
// Using Loop To Check One By One Either One is in string so it will convert it into Zero and zero into one
for (int i = 0; i < numbers.length(); i++)
{
if (numbers.at(i) == '0')
{
numbers.at(i) = '1';
}
else
{
numbers.at(i) = '0';
}
}
}

// Function Defination For displaying output
void Binary::display()
{
// Displaying output using loop
for (int i = 0; i < numbers.length(); i++)
{
cout<<numbers.at(i);
}
}

int main ()
{
// I have Created binary object in the end of Class
binary.read();
binary.chk_bin();
binary.ones_compliment();
binary.display();

return 0;
}