``````#include <iostream>
#include <iomanip>
using namespace std;
int main()
{
// Variables for used for user input
int nbase;

//  Users input is needed but no error checking is done as per lab instuctions
cout << "Please enter your choice for conversion.  The letter O for octal OR B for binary!" << endl;
cin >> nbase;

if (nbase == 2 || nbase == 8)
{
int total;
int r3;
int r2;
int r1;
int r0;
int convert;
// char lbase;
cin >> total;

//  The below math calculations break down the full four digit number so the user does not
//  have to enter 4 individual numbers.
r3 = total / 1000;
total = total - (r3 * 1000);
r2 = total / 100;
total = total - (r2 * 100);
r1 = total / 10;
total = total - (r1 * 10);
r0 = total;

if  (nbase == 2 && r3 && r2 && r1 && r0 <= 1 && r3 && r2 && r1 && r0 >= 0)
{
// This coverts the users numbers into the base specified earlier
convert = nbase * nbase * nbase * r3 + nbase * nbase * r2 + nbase * r1 + r0;
cout << "Your number converted to decimal is " << convert << endl;
}
else if (nbase == 8 && r3 && r2 && r1 && r0 <= 7 && r3 && r2 && r1 && r0 >= 0)
{
// This coverts the users numbers into the base specified earlier
convert = nbase * nbase * nbase * r3 + nbase * nbase * r2 + nbase * r1 + r0;
cout << "Your number converted to decimal is " << convert << endl;
}
else
{
cout << nbase << r3 << r2 << r1 << r0 << endl;
cout << "You did not enter a valid number, try again" << endl;
}
}
else
cout << "You did not enter 2 or 8, try again" << endl;

cin.get();
return 0;
}``````

I'm having trouble on lines 36 and 42 of my code. No errors occur when I compile but I cannot get line 36 and 42 to work the way I want. When I pick 1010 for my four digit binary number it does not work but 1111 works fine. I already tried to cout all my variables around line 35 just before the If statement so I can make sure nothing is assigned incorrectly. All my variables seem to be alright and when I work out the math portion on paper it seems to be ok. Any advice would be appeciated.

If you intend to check if each r value is less than or equal to 1 then you must say

``if(r3 <= 1 && r2 <= 1 && r1 <= 1 && r0 <= 1 )...``

Do this for each of your statements that are not working correctly.