Add one to binary string

[deanhystad]

Convert it to an int?

If this is a homework assignment, and you need to do the addition using the binary string, 1+1 = 0, carry the 1. You don't have a carry in you code.

I think it would also be easer working left to right instead of right to left. I would start by reversing the string "1010" to "0101", then I would do the addition, and finally I would reverse the string back.

Output:
1010 + 1
Reverse the strings
 0101
+1

Do the addition
0+1 = 1
1+_ = 1
0+_ = 0
1+_ = 1
1101

Reverse the result
1011

If there is a carry

Output:
1010 + 10
Reverse the strings
 0101
+01

Do the addition
0+0 = 0
1+1 = 0, carry = 1
0+_+carry = 1
1+_ = 1
0011

Reverse the result
1100