STL map in UNIX

[ashukasama]

I want to write shell programming in UNIX, alao i am new to unix. i have written very simple program for console

ISSUE:
I added some item in map as string int pair, now i am searching string read from commandline and i am unable to find it, but if i use same code with windows . i am able to do same.


Code is as follows

/
//Inclue files for libraries
#include <stdlib.h>
#include <ctype.h>
#include <iostream>
#include <fstream>
#include <iostream>
#include <iomanip>
#include <ctime> 
#include <string>
#include <stdio.h>
#include <map>
#include <algorithm>

using namespace std;

map <string, int> m1;

int main(int argc, char* argv[])
{
	m1.insert(map <string, int> :: const_iterator::value_type("cd",0));		
	m1.insert(map <string, int> :: const_iterator::value_type("dir",0));		
	m1.insert(map <string, int> :: const_iterator::value_type("pwd",0));		
	m1.insert(map <string, int> :: const_iterator::value_type("echo",0));		
	m1.insert(map <string, int> :: const_iterator::value_type("help",0));		
	m1.insert(map <string, int> :: const_iterator::value_type("quit",0));		
	map <string, int> :: const_iterator m1_AcIter, m1_RcIter;
	typedef pair <string, int> Int_Pair;

	if(argc == 1)
	{
		cout<<"Please enter unix command..";
	}
	else
	{
		string command;
		command =  argv[1];            
		map <string, int> :: const_iterator m1_AcIter, m1_RcIter;
		m1_AcIter   = m1.find(command);
		if(m1_AcIter  == m1.end())
		{
			cout<<"Didn't find unix command - "<< command<<endl ;
		}
		else
		{ 
			system(command.c_str());
		}

	}
	
	map <string, int> :: iterator it;
	for ( it=m1.begin() ; it != m1.end(); it++ )
		cout << (*it).first << " => " << (*it).second << endl;
	
	return 0;

}

now my input is
./a.out ls

and i received following output

Didn't find unix command - ls
cd => 0
dir => 0
echo => 0
help => 0
pwd => 0
quit => 0

but same code is working perfectly with windows,