Task3

gistfile1.txt

#include <string>
#include <iostream>
#include <fstream>
using namespace std;

int main()
{
	string str,str1,str2,dopstr;
	int count,i,j,k,pos,pos1,pos2;
	ifstream fin;
	ofstream fout;


	fin.open("input.txt");
	fout.open("output.txt");
	
	
	while(getline(fin,str))
	{
		if (str.find("host") == 0)
		{

			

			pos1 = 6;

			while(str[pos1] == ' ')
			{
				pos1++;
			}

			pos2=pos1;

			while(str[pos2] != ' ')
			{
				pos2++;
			}

			pos = str.find(" dns");

			str.erase(pos+1	,4);
			str = str.substr(0,pos1) + "dns "+str.substr(pos1);

		}

		fout<<str<<endl;

	}

	fout.close();
	fin.close();

	return 0;
}