diff --git a/api/http/cpp/example/Benchmark.cpp b/api/http/cpp/example/Benchmark.cpp
new file mode 100644
index 0000000..e7621d1
--- /dev/null
+++ b/api/http/cpp/example/Benchmark.cpp
@@ -0,0 +1,118 @@
+#include "client.h"
+#include <pthread.h>
+#include <iostream>
+#include <sstream>
+#include <string>
+#include <cstring>
+#include <fstream>
+using namespace std;
+#define tnum 4000
+bool correctness = true;
+pthread_mutex_t mutex;
+
+string int2string(int n)
+{
+    string s;
+    stringstream ss;
+    ss<<n;
+    ss>>s;
+    return s;
+}
+
+
+struct MyThread_args{
+	int num;
+	string sparql;
+	int rnum;
+};
+
+void* MyThread_run(void* thread_args)
+{
+	struct MyThread_args *args;
+	args = (struct MyThread_args *)thread_args;
+	CHttpClient hc;
+	string res;
+	int ret;
+	ret = hc.Get("http://172.31.222.94:9000/?operation=query&format=json&sparql="+args->sparql,res);
+	int m = 0;
+	for(int i = 0; i<args->sparql.length(); ++i)
+	{
+		if(args->sparql[i]=='?')
+			++m;
+		if(args->sparql[i]=='{')
+			break;
+	}
+	int n = 0;
+	for(int i = 0; i<res.length(); ++i)
+	{
+		if(res[i]=='{')
+			++n;
+	}
+	int Num = (n-3)/(m+1);
+	//if(Num<=10)
+	//{
+	//	ofstream f("result/"+int2string(args->num)+".txt");
+	//	f<<res<<endl;
+	//	f.close();
+	//}	
+	
+	if(args->rnum != Num)
+		correctness = false;
+	pthread_exit(NULL);
+}
+int main()
+{
+	int result[6] = {10, 14, 14, 199424, 33910, 1039};
+	string* sparql = new string[6];
+        sparql[0] = "select ?v0 where\
+                   {\
+                   ?v0 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/class/yago/LanguagesOfBotswana> .\
+                   ?v0 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type>    <http://dbpedia.org/class/yago/LanguagesOfNamibia> .\
+                   ?v0 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Language> .\
+                   }";
+        sparql[1] = "select ?v0 where\
+                   {\
+                   ?v0 <http://dbpedia.org/ontology/associatedBand> <http://dbpedia.org/resource/LCD_Soundsystem> .\
+                   }";
+        sparql[2] = "select ?v2 where\
+                   {\
+                   <http://dbpedia.org/resource/!!Destroy-Oh-Boy!!> <http://dbpedia.org/property/title> ?v2 .\
+                   }";
+        sparql[3] = "select ?v0 ?v2 where\
+                   {\
+                   ?v0 <http://dbpedia.org/ontology/activeYearsStartYear> ?v2 .\
+                   }";
+        sparql[4] = "select ?v0 ?v1 ?v2 where\
+                   {\
+                   ?v0 <http://dbpedia.org/property/dateOfBirth> ?v2 .\
+                   ?v1 <http://dbpedia.org/property/genre> ?v2 .\
+                   }";
+        sparql[5] = "select ?v0 ?v1 ?v2 ?v3 where\
+                   {\
+                   ?v0 <http://dbpedia.org/property/familycolor> ?v1 .\
+                   ?v0 <http://dbpedia.org/property/glotto> ?v2 .\
+                   ?v0 <http://dbpedia.org/property/lc> ?v3 .\
+                   }";
+	pthread_t qt[tnum];
+	void *status;
+	struct MyThread_args args[tnum];
+	for(int i = 0;i<tnum;i++)
+	{
+		args[i].num=i;
+		args[i].sparql=sparql[i%6];
+		args[i].rnum=result[i%6];
+		pthread_create(&qt[i],NULL,MyThread_run,(void *)&args[i]);
+	}
+	for(int i = 0;i<tnum;i++)
+	{
+		pthread_join(qt[i],&status);
+		
+	}
+	if(correctness == true)
+		cout<< "The answers are correct!" <<endl;
+	else
+		cout<< "The answers exist errors!" <<endl;
+	pthread_exit(NULL);
+	return 0;
+}
+
diff --git a/api/http/cpp/example/Makefile b/api/http/cpp/example/Makefile
index 1e51b8e..47c5a13 100644
--- a/api/http/cpp/example/Makefile
+++ b/api/http/cpp/example/Makefile
@@ -1,11 +1,17 @@
 CC=g++ -std=c++11
 #CC=ccache g++
+all: example Benchmark
+Benchmark: Benchmark.o
+	$(CC) -o Benchmark Benchmark.o -lcurl -L../lib -lclient -lpthread
 
 example: example.o
 	$(CC) -o example example.o -lcurl -L../lib -lclient
 
+Benchmark.o: Benchmark.cpp
+	$(CC) -c -I../ Benchmark.cpp -o Benchmark.o
+
 example.o: example.cpp
 	$(CC) -c -I../ example.cpp -o example.o
 
 clean:
-	rm -rf *.o example
+	rm -rf *.o example Benchmark
diff --git a/api/http/cpp/example/example.cpp b/api/http/cpp/example/example.cpp
new file mode 100644
index 0000000..87d86fa
--- /dev/null
+++ b/api/http/cpp/example/example.cpp
@@ -0,0 +1,94 @@
+//NOTICE: you need to use libcurl-devel for C++ to use HTTP client, please read client.cpp and client.h seriously
+
+
+#include <stdio.h> 
+#include <iostream>
+#include <string> 
+#include "client.h"
+
+using namespace std;
+
+int main()
+{
+	CHttpClient hc;
+	string res;
+	int ret;
+
+	//ret = hc.Get("http://172.31.222.94:9000/?operation=build&db_name=lubm&ds_path=data/LUBM_10.n3", res); 
+	//cout<<res<<endl;
+	
+	//ret = hc.Get("http://172.31.222.94:9000/?operation=load&db_name=lubm", res); 
+	//cout<<res<<endl;
+	int result[6] = {10, 14, 14, 199424, 33910, 1039};
+        string* sparql = new string[6];
+        sparql[0] = "select ?v0 where\
+                   {\
+                   ?v0 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/class/yago/LanguagesOfBotswana> .\
+                   ?v0 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type>    <http://dbpedia.org/class/yago/LanguagesOfNamibia> .\
+                   ?v0 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Language> .\
+                   }";
+        sparql[1] = "select ?v0 where\
+                   {\
+                   ?v0 <http://dbpedia.org/ontology/associatedBand> <http://dbpedia.org/resource/LCD_Soundsystem> .\
+                   }";
+        sparql[2] = "select ?v2 where\
+                   {\
+                   <http://dbpedia.org/resource/!!Destroy-Oh-Boy!!> <http://dbpedia.org/property/title> ?v2 .\
+                   }";
+        sparql[3] = "select ?v0 ?v2 where\
+                   {\
+                   ?v0 <http://dbpedia.org/ontology/activeYearsStartYear> ?v2 .\
+                   }";
+        sparql[4] = "select ?v0 ?v1 ?v2 where\
+                   {\
+                   ?v0 <http://dbpedia.org/property/dateOfBirth> ?v2 .\
+                   ?v1 <http://dbpedia.org/property/genre> ?v2 .\
+                   }";
+        sparql[5] = "select ?v0 ?v1 ?v2 ?v3 where\
+                   {\
+                   ?v0 <http://dbpedia.org/property/familycolor> ?v1 .\
+                   ?v0 <http://dbpedia.org/property/glotto> ?v2 .\
+                   ?v0 <http://dbpedia.org/property/lc> ?v3 .\
+                   }";
+	int tnum = 6;
+	tnum = 3000;
+	bool correctness = true;
+	for(int i = 0; i < tnum; ++i)
+	{
+		ret = hc.Get("http://172.31.222.94:9000/?operation=query&format=json&sparql="+sparql[i%6],res);
+		cout<< i <<endl;
+                int m = 0;
+		for(int ii = 0; ii<sparql[i%6].length(); ++ii)
+		{
+			if(sparql[i%6][ii] == '?')
+				++m;
+			if(sparql[i%6][ii] == '{')
+				break;
+		}
+		int n = 0;
+		for(int ii = 0; ii<res.length(); ++ii)	
+		{
+			if(res[ii] == '{')
+				++n;
+		}
+		int Num = (n-3)/(m+1);
+		if(Num!=result[i%6])
+			correctness =false;
+		
+	}
+	if (correctness == true)
+		cout<< "The answers are correct!" <<endl;
+	else
+		cout<< "The answers exist errors!" <<endl;
+	//ret = hc.Get("127.0.0.1:8080/query/data/ex0.sql", res); 
+	//cout<<res<<endl;
+	
+	//ret = hc.Get("http://172.31.222.94:9000/?operation=monitor", res); 
+	//cout<<res<<endl;
+	
+	//ret = hc.Get("http://172.31.222.94:9000/?operation=unload&db_name=lubm", res); 
+	//cout<<res<<endl;
+
+	return 0;
+}
+