How to get a sequential data from a string

[thexiv]

I have nearly everything in working order here. I just need the last variable in this. I have it commented (unlike anything else in the program ;P). Being as I am a beginner it should be pretty easy to relate to the method of the code. If you're a beginner you might pick something up about frameworks (storing data in asynchronous positions). The code itself here is a function to get the last 2 segments of code from a compressed file the code makes. It grabs the portionfour at the bottom and gets the `PN` from the code before. That was after 2 previous functions looked through the file.

The only thing I'm lacking is how to turn the last of the file, which is sequential digits into a unsigned int. I took a turn at it, and I need to know how to exercise it. Hence:

 void Node::extr_third(ifstream& in, unsigned int counter) {
	char d;
	int c = 10;
	filebuf* pbuf = in.rdbuf();
	in.seekg(0,in.end);
	long length = in.tellg();
	in.seekg(0,in.beg);

	// get file size using buffer's members
	size_t size = pbuf->pubseekoff (0,in.end,in.in);
	pbuf->pubseekpos (0,in.in);

	// allocate memory to contain file data
	char* mybuffer=new char[size];

	// get file data
	pbuf->sgetn (mybuffer,size);

	int v, i;
	long b = 0;

	char redline[] = { "thisisthestartofportionfour" };
	int frsize = sizeof(redline)/sizeof(char);
	char redcheck[frsize] = {};

	while (counter != length) {

		if (counter/length >= c/33) {
			c += 10;
			cout << "X" << flush;
		}

		for (int i = 0; i < frsize; ++i)
			redcheck[i] = mybuffer[counter+i];
		if (string(redcheck) == string(redline) && ! STOP) {
			STOP = 1;
		}
		else if (! STOP)
			PN.push_back(static_cast<unsigned int>(mybuffer[counter++]));
		else if (STOP) {
			if(isdigit(mybuffer[counter])) {
				cd[v] = mybuffer[counter++];
				v++;
			}
			else
				counter++;
		}
	}
	totalCnt = 0;
	for (int x = 0;x < v;x++) {
		int h = cd[x];
		totalCnt = totalCnt + (h * pow(10,v-x));
	}
	cout << endl << totalCnt << flush;
}

[thexiv]

The problem is I get this:

C:\cygwin64\bin>press -d
Press, Copyright Aunk 2016
Input File: press.cgr

Output File: press.txt
Data sorting.. [XXXXXXXXX 1 [main] press 9076 cygwin_exception::open_stackdumpfile: Dumping stack trace to press.exe.stackdump

[helios]

in.seekg(in.beg,in.end);
//...
in.seekg(in.end,in.beg);

If this works correctly, it's only by coincidence. It should be

in.seekg(0, in.end);
//...
in.seekg(0, in.beg);

[thexiv]

Okay, well that's changed now, helios. What about my question though?

[helios]

Sorry, I don't understand the question, or what you're trying to do.

[thexiv]

Okay, so the last output from the compressing execution lays out a bunch of chars.

the last thing I output is with

int totalCnt;
...
totalCnt++;
...
out << totalCnt;

That outputs as a real number. I want to collect each digit in that number. Next, I want to turn it into an `int`. So I use

     //This code is where I am getting the digits from
	while (counter != length-1) {
		cd[v++] = mybuffer[counter++];
	}
	totalCnt = int(cd);
	cout << totalCnt;

And technically, this should work, but it doesn't. Where in my loops am I screwing up?

[thexiv]

helios:
Should I put more code up?

[thexiv]

Here's my last output from the function that does the compression:

thisisthestartofportionfour 179922

So. What can I do with it?

[thexiv]

This is what solved it. 0 in ASCII is 48. So I take 48 away and I get the numeral. You can do endless numbers with this technique.

	while (counter != length) {

		if (counter/length >= c/33) {
			c += 10;
			cout << "X" << flush;
		}

		for (int i = 0; i < frsize; ++i)
			redcheck[i] = mybuffer[counter+i];
		if (string(redcheck) == string(redline) && ! STOP) {
			STOP = 1;
		}
		else if (! STOP)
			PN.push_back(static_cast<unsigned int>(mybuffer[counter++]));
		else if (STOP) {
			if(isdigit(mybuffer[counter])) {
				cd[v] = mybuffer[counter++];
				v++;
			}
			else
				counter++;
		}
	}
	totalCnt = 0;
	for (int x = 0;x < v;++x) {
		int h = cd[x] - 48;
		totalCnt = totalCnt + (h * pow(10,v-x-1));
	}