Something

#include <sstream>#include <iostream>#include <fstream>int main(){	std::ifstream instream;	instream.open ("input.txt");	if (instream.bad())		exit(1);	std::stringstream temp;	char buf[256];	do 	{		instream.getline(buf, 255);		if (strncmp (buf, "stop_string", 4) == 0)			break;		temp << buf << std::endl;	} while (instream.good());	return 0;}