Problem to search

// 
//

#pragma warning (disable: 4996) 
#include "stdafx.h"
#include <set>
#include <sys/stat.h>
#include <string>
#include <fstream>
#include <sstream>
#include <atlbase.h>
#include <ctype.h>
#include <process.h>
#include <vector>
#include <iostream>
#include <algorithm>
#include "..\..\include\nameval.h"
#include <iomanip>
#include <Windows.h>
struct stat fs = { 0 };
int ret; //
int numRecords;
nameval binrec;
bool LessComp(const nameval& a1, const nameval& a2)
{
	if (strcmp(a1.fld_nm, a2.fld_nm) < 0) return true;
	if (strcmp(a1.fld_nm, a2.fld_nm) > 0) return false;
	if (a1.fld_val < a2.fld_val) return true;
	return false;
}
int _tmain(int argc, _TCHAR* argv[])
{
	if (argc < 1)
	{
		return ERROR;
	}
	unsigned int nbegin = 0;
	unsigned int nend = numRecords - 1;
	unsigned int nmid;
	unsigned int nstop = 0;
	char nm_got[100];
	unsigned int val_got;
	time_t timev, currtime;
	float sec;
	timev = time(0);
	std::ifstream inputfiles;
	nameval names = { 0 };
		std::ostringstream filename;
		filename << "c:\\dp4\\flout_w.bin";
		std::set<nameval> records;
		std::set<nameval>::iterator iter;
		inputfiles.open(filename.str().c_str(), std::ios::binary | std::ios::in);
		if (!inputfiles.is_open())
			return -3; //
		if (!inputfiles.read((char*)&names, sizeof(nameval)))
			return -4; //
		ret = stat(filename.str().c_str(), &fs);
		if (ret != 0)
			return -4;
		numRecords = (int)(fs.st_size / sizeof(nameval));
		nbegin = 0;
		nend = numRecords - 1;
		nstop = 0;
		char szArgv2[512] = { 0 };
		size_t ncharsConverted = 0;
		wcstombs(szArgv2, argv[1], sizeof(szArgv2));
		while (nbegin <= nend && nstop != -1)
		{
			nmid = (nbegin + nend) / 2;
			nameval rec = { 0 };
			inputfiles.seekg(nmid* sizeof(nameval));
			inputfiles.read((char*)&rec, sizeof(nameval));
			if (strcmp(szArgv2, rec.fld_nm)<0)
			{
				nend = nmid - 1;
				nmid = (nbegin + nend) / 2;
			}
			else
			{
				if (strcmp(szArgv2, rec.fld_nm)>0)
				{
					nbegin = nmid + 1;
					nmid = (nbegin + nend) / 2;
				}
				else
				{
					nstop = -1;
					strcpy(rec.fld_nm, nm_got);
					val_got = rec.fld_val;
				}
			}
		}
		if (nstop == -1)
		{
			std::cout << "\nFound it!\n";
			std::cout << "(From vector record: " << nm_got
				<< ' ' << val_got << ")\n";
		}
		else std::cout << "\nDidn't find it within file -'" << filename.str().c_str() << "'!\n";
	return 0;
}

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C:\ReadBinaryFile\x64\Release>ReadBinaryFile "zzzwBdUCSIZpiPajxmVV"

Found it!
(From vector record: Éï? 588081)

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C:\ReadBinaryFile\x64\Release>ReadBinaryFile "zzzzzOMoXmtyPzuCfXEJ"

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// nameval.h
#ifndef NAME_VAL_H
#define NAME_VAL_H

struct nameval
{
     char fld_nm[21];
     long long    fld_val;

     int  get_len() { return (int)min(strlen(fld_nm), sizeof(fld_nm) ) ; }
     void get_uni_nm(wchar_t nm_uni[], int sizfld)
     {
            //mbstowcs_s(nm_uni, fld_nm, min(sizfld-1, strlen(fld_nm)));
			size_t ncharsConverted = 0;
			mbstowcs_s(&ncharsConverted, nm_uni, sizfld, fld_nm, min(sizfld-1, (int)strlen(fld_nm)));
     }
     bool operator< (const nameval & a2) const
     {
           if(strcmp(fld_nm, a2.fld_nm) < 0) return true;
           if(strcmp(fld_nm, a2.fld_nm) > 0) return false;
           if (fld_val < a2.fld_val) return true;
           return false;
     }
};

#endif

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