Re: Multiple substrings = Error

Hi, I need to manipulate a string by swapping pairs of 2 characters
around. I tried using the substr function to extract the characters,
but I get getting debug errors when it runs. Here is an example:

Input:
01110100
    01 11 01 00

Swap:
00 01 11 01

Output:
10011001

My code:
flipString1 = binString.substr(0,2);
flipString2 = binString.substr(2,2);
flipString3 = binString.substr(4,2);
flipString4 = binString.substr(6,2);
binString = flipString4 + flipString3 + flipString2 + flipString1;

If it comment out all but one of the substr commands, the program runs
fine. If I try to do multiple, I get an error (Abnormal Program
Termination). I am using the Microsoft Visual C++ 6.0 compiler.

the flipString variables are declared as such:

string flipString1 = string();
string flipString2 = string();
string flipString3 = string();
string flipString4 = string();

I also tried to reference binString as a char array and concat them
together, but it did not work. Example:
string flipString1 = binString[0] + binString[1];

Any ideas?