diff --git a/general/src/pattern/ringbuffer.hpp b/general/src/pattern/ringbuffer.hpp
index 16cb946..bf9ef4a 100644
--- a/general/src/pattern/ringbuffer.hpp
+++ b/general/src/pattern/ringbuffer.hpp
@@ -24,8 +24,8 @@ public:
 protected:
     T *m_data;
     T *m_data_end;
-    uint64_t m_size;
-    uint32_t m_len;
+    uint64_t m_size; // 容量
+    uint32_t m_len;  // 数据长度
     T *m_head;
 };
 
@@ -150,16 +150,18 @@ int  RingBuffer<T>::TakeBack(T *data,uint64_t len){
     T *tail = nullptr;
     if(m_len == 0)
         return 0;
-    if((m_head + m_len) > m_data_end){
-        std::cout<< 1;
-        tail = m_head + m_len - m_size;
+    
+    if((m_data + (m_len - 1)) > m_data_end){
+        tail = m_data + (m_len - 1) - m_size;
+        printf("m_data_end:%u m_head + m_len:%u m_head: %u  m_len:%ld tail: %u m_size: %ld m_data:%u\r\n",m_data_end,(m_head + m_len),m_head,m_len,tail,m_size,m_data);
     }else{
-        tail = m_head + m_len - 1;
+        tail = m_data + m_len - 1;
     }
 
     int i = 0;
 
     for(i = 0;i < len;i++) {
+        // std::cout<<"take" <<i<<std::endl;
         data[len - 1 - i] = (*tail) ;
         if((tail == m_head)) { 
             i++;
diff --git a/test/src/cpp11/CMakeLists.txt b/test/src/cpp11/CMakeLists.txt
index 0000d62..2633bcc 100644
--- a/test/src/cpp11/CMakeLists.txt
+++ b/test/src/cpp11/CMakeLists.txt
@@ -15,7 +15,7 @@ link_directories("../../../obj/")
 link_directories("./third/gtest/lib")
 
 link_libraries(generallib)
-link_libraries(jsoncpp)
+# link_libraries(jsoncpp)
 
 include_directories("./third/jsoncpp/include/json")
 include_directories("../../../obj/inc/")
diff --git a/test/src/cpp11/template.cpp b/test/src/cpp11/template.cpp
index 57838db..b0dbc9f 100644
--- a/test/src/cpp11/template.cpp
+++ b/test/src/cpp11/template.cpp
@@ -10,6 +10,7 @@
 #include <vector>
 #include "pattern/ringbuffer.hpp"
 #include <tuple>
+#include <math.h>
 
 using namespace std;
 
@@ -24,84 +25,106 @@ void clearBuffer(int *dat,int len){
 }
 void TestRingBuffer(){
     int in[1024];
+    int out[1024];
 
     for(int i = 0;i < 1024;i ++){
         in[i] = i;
     }
     RingBuffer<int> x(1024);
-    int ret = x.Add(in,512);
-    std::cout<<"add "<<ret<<"  x.Length():" <<  x.Length() << " "<<std::endl;
-    for(uint32_t i = 0;i < x.Length();i++){
-        std::cout<<x.At(i) <<" ";
-    }
-    std::cout<<"\r\n clear x----------------------------------"<<std::endl;
-    x.SetEmpty();
-    std::cout<<"\r\n ----------------------------------"<<std::endl;
-    std::cout<<"add data :"<<std::endl;
-    for(uint32_t i = 0;i < 516;i++){
-        std::cout<<in[i] <<" ";
-    }
-    ret = x.Add(in,516);
-    std::cout<<"after add "<<ret << " length: "<< x.Length()<<"\r\n"<<std::endl;
-    for(uint32_t i = 0;i < x.Length();i++){
-        std::cout<<x.At(i) <<" ";
-    }
-    std::cout<<"\r\n----------------------------------"<<std::endl;
-    clearBuffer(in,1024);
-    ret = x.Add(in,20);
-    std::cout<<"add "<<ret<<"\r\n"<<std::endl;
-    for(uint32_t i = 0;i < x.Length();i++){
-        std::cout<<x.At(i) <<" ";
-    }
-    std::cout<<"\r\n----------------------------------"<<std::endl;
-    clearBuffer(in,1024);
+    
+    for(int i = 0;i < 10;i++){
+        std::cout<<std::endl<<"----------------------------------"<<"\r\n";
+        int ran = rand()%1024;
+        int ret = x.Add(in,ran);
+        std::cout<<"add "<<ran<<"  x.Length():" <<  x.Length() << " "<<std::endl;
+        for(uint32_t i = 0;i < x.Length();i++){
+            std::cout<<x.At(i) <<" ";
+        }
+        std::cout<<"----------------------------------"<<"\r\n";
+
+        int ran2 = rand()%1024;
+        x.TakeBack(out,ran2);
+        std::cout<<"take "<<ran2<<"  x.Length():" <<  x.Length() << " "<<std::endl;
+        for(uint32_t i = 0;i < x.Length();i++){
+            std::cout<<x.At(i) <<" ";
+        }
+        std::cout<<std::endl<<"----------------------------------"<<"\r\n";
 
-    std::cout<<"before take x: "<< x.Length()<<std::endl;
-    for(uint32_t i = 0;i < x.Length();i++){
-        std::cout<<x.At(i) <<" ";
-    }
-    std::cout<<"\r\n----------------------------------"<<std::endl;
-    ret = x.TakeBack(in,20);
-    std::cout<<"take "<<ret<<"\r\n"<<std::endl;
-    for(uint32_t i = 0;i < ret;i++){
-        std::cout<<in[i] <<" ";
-    }
-    std::cout<<"\r\n----------------------------------"<<std::endl;
-    std::cout<<"after take x: "<<x.Length()<<"\r\n"<<std::endl; 
-    for(uint32_t i = 0;i < x.Length();i++){
-        std::cout<<x.At(i) <<" ";
-    }
-    clearBuffer(in,1024);
-    std::cout<<"\r\n----------------------------------"<<std::endl;
-    ret = x.TakeBack(in,20);
-    std::cout<<"take "<<ret<<"\r\n"<<std::endl;
-    for(uint32_t i = 0;i < ret;i++){
-        std::cout<<in[i] <<" ";
-    }
-    std::cout<<"\r\n----------------------------------"<<std::endl;
-    std::cout<<"after take x: "<<x.Length()<<"\r\n"<<std::endl; 
-    std::cout<<"----------------------------------"<<"\r\n";
-    for(int z = 0;z < x.Length();z++){
-        std::cout<<x.At(z) <<" ";
-    }
-    clearBuffer(in,1024);
-    ret = x.TakeFront(in,496);
-    std::cout<<"\r\ntake from front "<<ret<<"\r\n"<<std::endl;
-    for(uint32_t i = 0;i < ret;i++){
-        std::cout<<in[i] <<" ";
-    }
-    std::cout<<"\r\nafter take x: "<<x.Length()<<"\r\n"<<std::endl; 
-    std::cout<<"----------------------------------"<<"\r\n";
-    for(int z = 0;z < x.Length();z++){
-        std::cout<<x.At(z) <<" ";
     }
+
+    // int ret = x.Add(in,512);
+    // std::cout<<"add "<<ret<<"  x.Length():" <<  x.Length() << " "<<std::endl;
+    // for(uint32_t i = 0;i < x.Length();i++){
+    //     std::cout<<x.At(i) <<" ";
+    // }
+    // std::cout<<"\r\n clear x----------------------------------"<<std::endl;
+    // x.SetEmpty();
+    // std::cout<<"\r\n ----------------------------------"<<std::endl;
+    // std::cout<<"add data :"<<std::endl;
+    // for(uint32_t i = 0;i < 516;i++){
+    //     std::cout<<in[i] <<" ";
+    // }
+    // ret = x.Add(in,516);
+    // std::cout<<"after add "<<ret << " length: "<< x.Length()<<"\r\n"<<std::endl;
+    // for(uint32_t i = 0;i < x.Length();i++){
+    //     std::cout<<x.At(i) <<" ";
+    // }
+    // std::cout<<"\r\n----------------------------------"<<std::endl;
+    // clearBuffer(in,1024);
+    // ret = x.Add(in,20);
+    // std::cout<<"add "<<ret<<"\r\n"<<std::endl;
+    // for(uint32_t i = 0;i < x.Length();i++){
+    //     std::cout<<x.At(i) <<" ";
+    // }
+    // std::cout<<"\r\n----------------------------------"<<std::endl;
+    // clearBuffer(in,1024);
+
+    // std::cout<<"before take x: "<< x.Length()<<std::endl;
+    // for(uint32_t i = 0;i < x.Length();i++){
+    //     std::cout<<x.At(i) <<" ";
+    // }
+    // std::cout<<"\r\n----------------------------------"<<std::endl;
+    // ret = x.TakeBack(in,20);
+    // std::cout<<"take "<<ret<<"\r\n"<<std::endl;
+    // for(uint32_t i = 0;i < ret;i++){
+    //     std::cout<<in[i] <<" ";
+    // }
+    // std::cout<<"\r\n----------------------------------"<<std::endl;
+    // std::cout<<"after take x: "<<x.Length()<<"\r\n"<<std::endl; 
+    // for(uint32_t i = 0;i < x.Length();i++){
+    //     std::cout<<x.At(i) <<" ";
+    // }
+    // clearBuffer(in,1024);
+    // std::cout<<"\r\n----------------------------------"<<std::endl;
+    // ret = x.TakeBack(in,20);
+    // std::cout<<"take "<<ret<<"\r\n"<<std::endl;
+    // for(uint32_t i = 0;i < ret;i++){
+    //     std::cout<<in[i] <<" ";
+    // }
+    // std::cout<<"\r\n----------------------------------"<<std::endl;
+    // std::cout<<"after take x: "<<x.Length()<<"\r\n"<<std::endl; 
+    // std::cout<<"----------------------------------"<<"\r\n";
+    // for(int z = 0;z < x.Length();z++){
+    //     std::cout<<x.At(z) <<" ";
+    // }
+    // clearBuffer(in,1024);
+    // ret = x.TakeFront(in,496);
+    // std::cout<<"\r\ntake from front "<<ret<<"\r\n"<<std::endl;
+    // for(uint32_t i = 0;i < ret;i++){
+    //     std::cout<<in[i] <<" ";
+    // }
+    // std::cout<<"\r\nafter take x: "<<x.Length()<<"\r\n"<<std::endl; 
+    // std::cout<<"----------------------------------"<<"\r\n";
+    // for(int z = 0;z < x.Length();z++){
+    //     std::cout<<x.At(z) <<" ";
+    // }
     fflush(stdout);
-    getchar();
 }
 
 int main() {
-    auto x = ReturnMoreData();
-    std::cout<<"x first is "<<std::get<0>(x) << std::get<1>(x)<<std::endl;
-    std::cout<<"main"<<std::endl;
+
+    // auto x = ReturnMoreData();
+    // std::cout<<"x first is "<<std::get<0>(x) << std::get<1>(x)<<std::endl;
+    // std::cout<<"main"<<std::endl;
     TestRingBuffer();
 }
\ No newline at end of file