New to Linux, std::string problem

[VSH]

Hi all this is my first topic and post and only my second day using Linux, so here goes.

I recently installed Ubuntu 10.10 and Im in the process of migrating a C++ console simulation to Ubuntu from Windows.

I have a class with an std::string member variable which is returned by a getStringMember() method. Now I need to compare this returned value for equality with the string "Buy".

the code simply looks like this:

std::string returnedString = object.getStringMember();
std::string comparisonString = "Buy";

When returnedString is "Buy" the two strings should be equal, which is the case in my Windows version. However in Ubuntu and using Code::Blocks with gcc the returned string has always a size that is one larger than it ought to. Ive checked that there is no trailing spaces attached.

Does Linux encode std::strings differently and if so what do i need to do for the code to perform as required?

Thanks very much for your time.

[Bazzy]

There may be some non printable chars in there.
Character encoding shouldn't matter

[mikeofthenight]

There is a couple of things you can try to determine the problem.

1/ run size on both strings
std::cout << "Returned string size is " << returnedString.size() << std::endl;
std::cout << "ComparisonString size is " << comparisontring.size() << std::endl;

If the sizes are different the try removing whitespace chars from each string

2/ First with returnedString
std::string::size_type index;

index = returnedString.find_last_not_of(" \t\n");
returnedString.erase(index+1); // trim trailing whitespace

index = returnedString.find_first_not_of(" \t\n");
returnedString.erase(0,index); // trim leading whitespace

Try your program now.....

2/ Next with comparisonstring

index = comparisonstring.find_last_not_of(" \t\n");
comparisonstring.erase(index+1); // trim trailing whitespace

index = comparisonstring.find_first_not_of(" \t\n");
comparisonstring.erase(0,index); // trim leading whitespace

Try your progam again. Both strings should be same size and should work.

~

[moorecm]

Start by posting the comparing code...