Write a program in C++ to find one's complement of a binary number

#include <iostream>
#define SZ 8
using namespace std;
int main()
{
    int i;
    char binary[SZ + 1], onesComp[SZ + 1];
    int error = 0;
    cout << "\n\n Find one's complement of a binary value:\n";
    cout << "----------------------------------------------\n";
    cout << " Input a " << SZ << " bit binary value: ";
    cin >> binary;
    for (i = 0; i < SZ; i++) 
    {
        if (binary[i] == '1') 
        {
            onesComp[i] = '0';
        }
        else if (binary[i] == '0') 
        {
            onesComp[i] = '1';
        }
        else 
		{
            cout << "Invalid Input. Input the value of assign bits." << endl;
            error = 1;
            break;
        }
    }
    onesComp[SZ] = '\0';
    if (error == 0) 
    {
        cout << " The original binary = " << binary << endl;
        cout << " After ones complement the number = " << onesComp << endl;
    }
}