"This html code <text blah >contains <garbage blah blah >. All tags must go,<text > but some must be replaced with <garbage blah blah > without erasing other info."

delimiter1: '<garbage'
delimiter2: '>'
replace with: 'important info'

delimiter3: '<'
delimiter4: '>'
replace with: ''

This html code contains important info

This html code contains important info. All tags must go, but some must be replaced with important info without erasing other info.

// Compile and run with:
//
// g++ -O -Wall replace.cpp -o replace
//

#include<iostream>
#include<string>
#include<fstream>

using namespace std;

string replaceText (string text, string tStart, string tStop, string tReplace)
{

	long int begPos;
	long int endPos;
	int found=1;

	while ((text.find(tStart) != std::string::npos) && (found == 1)) {

		found = 0;

		begPos = text.find(tStart);
		endPos = text.find(tStop);

			if (tStop != "")
                        {
				text.replace(begPos, endPos - begPos + tStop.length(), tReplace);
				found = 1;
			}else{
				text.replace(begPos, tStart.length(), tReplace );
				found = 1;
			}

		// Used for testing to see positions of replaced text:
		std::cout << "Replacing from: " << tStart << " ...to... " << tStop << " at Start Pos: " << begPos << " Stop Pos: " << endPos << " with " << tReplace << " \n" << endl;

	}

	return text;
}

int main(int argc, char* argv[])
{
	
	keyFound="This html code <text blah >contains <garbage blah blah >. All tags must go, <text > but some must be replaced with <garbage blah blah > without easing other info.";

	// Run this code twice: once with the below line of code commented, and once without:
	keyFound=replaceText(keyFound, "<garbage", ">", "important info");
	keyFound=replaceText(keyFound, "<", ">", "");

	std::cout << keyFound << endl;

	return 0;
}