# Combine string

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Hi, this is what i am doing: I got a hex string : "4F 6E 67" I wish to combine the string to make it without the spacing which is "4F6E67". How can I do that? Thanks in advance.

What language?

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C++, i need urgent help. Thanks.

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There's boost::erase_all, like so:
std::string str = "4F 6E 67";boost::erase_all(str, " ");std::cout << str << std::endl;
If you don't use boost, then you'll probably just have to do it manually: copy characters to a new string one by one, skipping over the ones you don't want.

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Also, you could do it with two pointers and two loops.
This would save you from having to copy the string.

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Thanks for the reply. I can't use the erase function. I am quite new in C++ programming, can someone show me how to pick the character manually and then combine it again? Thanks in advance.

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Wait, is this related to your other post? If you didn't want spaces in the string to begin with, why are you using code that puts them there?

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Quote:
 Original post by CodekaIf you don't use boost, then you'll probably just have to do it manually
You can still be terse using the the standard library:

std::string a("4F 6E 67");
std::string b;
std::remove_copy(a.begin(), a.end(), std::back_inserter(b), ' ');
std::cout << b;

Not as nice to look at without Boost but still easier than writing it manually.

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Thanks for the reply. I am doing it in tis way, but seems like it doesnt work.

int j(0);
CString hexNewOutput;
int DataLength = 0;

hexstrOutput="4F 6E 67";
DataLength = hexstrOutput.GetLength();
for ( int i = 0; i<DataLength; i++)
{
if (hexstrOutput!=' ')
{
hexNewOutput[j] = hexstrOutput;
j++;
}
}

Any comment?

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Presumably the character indexing operator[] of CString doesn't resize the string? So doing this: hexNewOutput[j] when that string has as size of zero is a bad idea. You can probably use the += operator to append the character though.

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