STRING PROBLEM!

[Kingrap]

but result : 74657374æ╬J

help me please!
i have a string whit hex number, i do convert to text!

[Nightblizard]

I would do it this way:

std::string hexStringToString(std::string data)
{
	std::string result;
	result.reserve(data.length());

	for(size_t i = 0; i < data.length(); i+=2)
	{
		unsigned long x = 0;
		std::stringstream ss;

		ss << std::hex << data.substr(i, 2);
		ss >> x;

		result.append(1, static_cast<char>(x));
	}

	return result;
}

[Tyrar]

Originally Posted by Nightblizard

I would do it this way:

std::string hexStringToString(std::string data)
{
	std::string result;
	result.reserve(data.length());

	for(size_t i = 0; i < data.length(); i+=2)
	{
		unsigned long x = 0;
		std::stringstream ss;

		ss << std::hex << data.substr(i, 2);
		ss >> x;

		result.append(1, static_cast<char>(x));
	}

	return result;
}

std::string hexStringToString(std::string data)
{
	std::stringstream result;

	for(size_t i = 0; i < data.length(); i+=2)
		result << std::hex << data.substr(i, 2);

	return result.str();
}

[Nightblizard]

Originally Posted by HeavyHacker

std::string hexStringToString(std::string data)
{
	std::stringstream result;

	for(size_t i = 0; i < data.length(); i+=2)
		result << std::hex << data.substr(i, 2);

	return result.str();
}

Yeah, that is even better!


Edit:
Oh, since he's using an old compiler, he should pass data by reference! No move ctor without C++11.

Edit2:
Nope, that doesn't work. ****, I should have checked it before I've posted this.
What you do is taking the data string, putting it into a stringstream and returning it without modification.

[MrSm!th]

As I said, stringsteams would be nicer.

Btw. i found a mistake in my code:

string result;
result.reserve(data.capacity()/2 + 1);

for(int i=0; i<data.length(); i += 2)
{
    string tmp = data.substr(i, 2);
    char c = strtol(tmp.c_str(), nullptr, 16);
    result.push_back(c);
}

[Kingrap]

i have complete! thanks friends