#include <iostream.h>
#include <fstream.h> 
#include <string.h>
#include <stdlib.h>

int  usage()
{
	cout << "a proper call is \n     txtcon infile outfile\n";
	return EXIT_FAILURE;
}


int  inf_failure(char * filename)
{
	cout << "cannot open " << filename <<
		" for input\n";
	return EXIT_FAILURE;
}

int  outf_failure(char * filename)
{
	cout << "cannot open " << filename <<
		" for output\n";	
	return EXIT_FAILURE;
}
 
void txtconv (ifstream inf, ofstream outf)
{
	char Symbols[] = ".XO";
	char S[10000];
	char *sp, *sp1;
	outf << "$$B Caption \n";
	outf << "$$ ---------------------------------------\n";
	while(1)
	{
		inf.getline(S, 10000);
		if(inf.eof()) break;
		sp = strpbrk(S, Symbols);
		if (!sp) continue;
		if (sp - S > 6) continue;
		sp1 = S + strlen(S) -1;
		while (!strchr(Symbols, *sp1)) 
			*sp1-- = 0; 
	
		outf << "$$ |" << sp  << "|" << endl;
	}
	outf << "$$ ---------------------------------------\n";
}

int main(int argc, char** argv)
{
	if (argc !=3) return usage();
	ifstream inf(argv[1]);
	if (!inf) return inf_failure(argv[1]);
	ofstream outf(argv[2]);
	if (!outf) return outf_failure(argv[2]);
	txtconv(inf, outf);	
 
	return EXIT_SUCCESS; 
}