So, I was trying to make base converter as my first C++ file, but it gave me
Microsoft C++ exception: std::out_of_range at memory location 0x003ffd20..
Unhandled exception at 0x778fb9bc in convert.exe: Microsoft C++ exception: std::out_of_range at memory location 0x003ffd20..
convert.exe has triggered a breakpoint
while running the code.
Why?
code at link.
http://pastebin.com/Qw1235tD

That looks to be a problem with the compilation process. Is it installed properly?

Also, MSVC++ has a really good debugger that's easier to use compared to GDB.

so my code is correct, right?

I don't see anything wrong with the code, it does nothing out of the ordinary.  I'm with Netham, it's something to do with the compilation process probably.  The MSVC++ is rather easy to mess up with at primary installation, so perhaps reinstall the compiler?

Ephan: I doubt there is no debugger for VC++.  MinGW is a good suggestion, but it is harder to setup for newbies and even harder to work with (makefiles, complex command line invocations, etc.) so perhaps let's see if we can get VC++ working for you first before you convert.

First let's try debugging your Visual C++ program. One thing I notice is that you're indexing all of your substrings starting at 1 instead of 0. Also, you're trying to use the ^ operator as exponentiation, when it is really bitwise XOR. Try using math.pow() instead. On line 35, you're also indexing your string with temp instead of temp3.

Edit: I bet std::out_of_range is caused by a bad substr call. Remember, indices only go from 0 to length-1. Index at length and it's out of range.