diff --git a/main.cpp b/main.cpp
new file mode 100644
index 0000000..398359b
--- /dev/null
+++ b/main.cpp
@@ -0,0 +1,140 @@
+#include <iostream>
+#include <fstream>
+#include <set>
+#include <string>
+#include <vector>
+#include <sstream>
+#include <map>
+
+
+int main(int argc, char** argv)
+{
+	std::ifstream in; 
+	if(argc <3 )
+		return 1;
+	char* file1 = argv[1];
+	char* file2 = argv[2];
+	char buffer[255];
+	std::set<std::string> set1;
+	std::set<std::string> set2;
+	std::set<std::string> diff1_2;
+	std::set<std::string> diff2_1;
+	std::map<std::string, std::string> orghash;
+	in.open(file1);
+	while(!in.eof())
+	{
+		std::vector<std::string> temp_storage;
+		in.getline(buffer, 255);
+		//delimeter process
+		std::string str = buffer;
+		std::size_t prepos=0, pos = str.find_first_of(" \t");
+		while(pos != std::string::npos)
+		{
+			temp_storage.push_back(str.substr(prepos, pos-prepos));
+			prepos = pos+1;
+			while( ( pos = str.find_first_of(" \t",pos+1)) != std::string::npos )
+				if( pos != prepos) 
+					break;
+				else
+					prepos = pos+1;
+		}
+		temp_storage.push_back(str.substr(prepos, pos-prepos));
+		str="";
+		for(std::vector<std::string>::iterator it= temp_storage.begin(); it!= temp_storage.end(); it++)
+			str += *it + " ";
+		//delimeter process end
+		
+		set1.insert(str);
+	}
+	in.close();
+	in.open(file2);
+	while(!in.eof())
+	{
+		std::vector<std::string> temp_storage;
+		in.getline(buffer,255);
+	//delimeter process
+		std::string str = buffer;
+		std::size_t prepos=0, pos = str.find_first_of(" \t");
+		while(pos != std::string::npos)
+		{
+			
+			temp_storage.push_back(str.substr(prepos, pos-prepos));
+			prepos = pos+1;
+//			pos = str.find_first_of(" \t",pos+1);
+			while( ( pos = str.find_first_of(" \t",pos+1)) != std::string::npos )
+				if( pos != prepos) 
+					break;
+				else
+					prepos = pos+1;
+		}
+		temp_storage.push_back(str.substr(prepos, pos-prepos));
+		str="";
+		for(std::vector<std::string>::iterator it= temp_storage.begin(); it!= temp_storage.end(); it++)
+			str += *it + " ";
+		//delimeter process end
+		
+		set2.insert(str);
+	}
+	in.close();
+
+	diff1_2 = set1;
+	diff2_1 = set2;
+
+	for(std::set<std::string>::iterator it = set1.begin(); it!= set1.end(); it++)
+		diff2_1.erase(*it);
+	for(std::set<std::string>::iterator it = set2.begin(); it!= set2.end(); it++)
+		diff1_2.erase(*it);
+
+
+	for(std::set<std::string>::iterator it = diff1_2.begin(); it!= diff1_2.end(); it++)
+	{
+		std::string str = *it;
+		std::size_t pos = str.find_first_of(" ");
+		orghash[str.substr(0,pos)] = str.substr(pos+1);
+	}
+	for(std::set<std::string>::iterator it = diff2_1.begin(); it!= diff2_1.end(); it++)
+	{
+		std::string str = *it;
+		std::size_t pos = str.find_first_of(" ");
+		if(!orghash[str.substr(0,pos)].empty())
+		{
+			std::string outputstr="";
+			std::cout<< str.substr(0,pos)<< " " <<orghash[str.substr(0,pos)]<<std::endl;
+			for(int i=0; i<pos+1; i++)
+				outputstr += " ";
+
+			str = orghash[str.substr(0,pos)];
+			std::size_t prepos=0, pos = str.find_first_of(" ");
+			while(pos != std::string::npos)
+			{
+			
+			str.substr(prepos, pos-prepos);
+			prepos = pos+1;
+//			pos = str.find_first_of(" \t",pos+1);
+			while( ( pos = str.find_first_of(" \t",pos+1)) != std::string::npos )
+				if( pos != prepos) 
+					break;
+				else
+					prepos = pos+1;
+		}
+		temp_storage.push_back(str.substr(prepos, pos-prepos));
+		
+			
+
+			std::cout<< 
+		}
+	}
+
+	std::cout<<"only on "<<file1<<"  contents"<<std::endl;
+	for(std::set<std::string>::iterator it = diff1_2.begin(); it!= diff1_2.end(); it++) 
+		std::cout<<*it<<std::endl;
+
+	std::cout<<std::endl<<std::endl;
+	std::cout<<"only on "<<file2<<"  contents"<<std::endl;
+	for(std::set<std::string>::iterator it = diff2_1.begin(); it!= diff2_1.end(); it++) 
+		std::cout<<*it<<std::endl;
+
+
+
+	return 0;	
+}