diff --git a/general/inc/utils.h b/general/inc/utils.h
index 340b4c4..58e2ba8 100644
--- a/general/inc/utils.h
+++ b/general/inc/utils.h
@@ -35,5 +35,8 @@ inline ENV_COMPILER CurrentEnvCompiler();
 string itos(int x);
 
 
+// 限制float精确度
+float LimitFloat(float in,int size);
+
 
 #endif //CUTILS_UTILS_H
diff --git a/general/src/encrypt/aes.cpp b/general/src/encrypt/aes.cpp
index 153da32..e643343 100644
--- a/general/src/encrypt/aes.cpp
+++ b/general/src/encrypt/aes.cpp
@@ -1,6 +1,3 @@
-//
-// Created by 29019 on 2020/1/4.
-//
 
 #include "aes.h"
 #include <cstring>
diff --git a/general/src/loger.cpp b/general/src/loger.cpp
index 4565893..f8b56e1 100644
--- a/general/src/loger.cpp
+++ b/general/src/loger.cpp
@@ -116,6 +116,7 @@ int Loger::Error(string dat,string  function,int line) {
     return 0;
 }
 
+
 int Loger::Warning(string dat,string  function,int line) {
     if(mLevel  >  LEVEL_WARNING) {
         return 0;
@@ -343,7 +344,7 @@ Loger::Loger(string path,string prefix,bool old)  {
     }else{
         this->mFile = fopen(this->mCurrentPath.c_str(),"a+");
     }
-    if(! this->mFile){
+    if(!this->mFile){
         fprintf(stderr,"error open log files %s code %d,please check file path",this->mCurrentPath.c_str(),errno);
         exit(0);
     }else{
diff --git a/general/src/utils.cpp b/general/src/utils.cpp
index a516e61..f2a2d93 100644
--- a/general/src/utils.cpp
+++ b/general/src/utils.cpp
@@ -62,3 +62,17 @@ inline ENV_COMPILER CurrentEnvCompiler()
 }
 
 
+
+// 限制float有效位
+float LimitFloat(float in,int size){
+	uint64_t tmp =  1;
+	for(int i = 0;i < size;i++){
+		tmp = tmp*10;
+	}
+	uint64_t integer = uint64_t(in * tmp);  // 提取整数部分
+
+	uint64_t decimal = integer %tmp; // 提取小数部分
+	std::cout<< "float_limit " << in<< " "<< integer << "  "<< decimal <<  "  "<< tmp <<std::endl;
+
+	return float(integer)/tmp;
+}
diff --git a/test/src/cpp11/log_test.cpp b/test/src/cpp11/log_test.cpp
index e9f2585..6e07587 100644
--- a/test/src/cpp11/log_test.cpp
+++ b/test/src/cpp11/log_test.cpp
@@ -17,8 +17,27 @@ typedef struct testsize2{
 }Test2;
 #pragma pack()
 
+// 限制float有效位
+float LimitFloat(float in,int size){
+	uint64_t tmp =  1;
+	for(int i = 0;i < size;i++){
+		tmp = tmp*10;
+	}
+	uint64_t integer = uint64_t(in * tmp);  // 提取整数部分
+
+	uint64_t decimal = integer %tmp; // 提取小数部分
+	std::cout<< "float_limit " << in<< " "<< integer << "  "<< decimal <<  "  "<< tmp <<std::endl;
+
+	return float(integer)/tmp;
+}
+
 int main(){
-	std::cout<<sizeof(Test1) << " "<<  sizeof(Test2)<<std::endl;
+	std::cout<< LimitFloat(1.123,2)<<std::endl;
+	std::cout<<LimitFloat(1.123,3) << std::endl;
+	std::cout<<LimitFloat(0.789,1) << std::endl;
+	std::cout<<LimitFloat(0,3) << std::endl;
+
+	std::cout<<"\r\n"<<std::endl<<sizeof(Test1) << " "<<  sizeof(Test2)<<std::endl;
 	Test1 x = Test1{
 		1,2,3
 	};
diff --git a/test/src/cpp11/thread_usage.cpp b/test/src/cpp11/thread_usage.cpp
index 17553ba..0bb4ee6 100644
--- a/test/src/cpp11/thread_usage.cpp
+++ b/test/src/cpp11/thread_usage.cpp
@@ -58,11 +58,14 @@ void print_thread_id (int id) {
 
 void TestLockGuard() {
     std::thread threads[10];
-    // spawn 10 threads:
-    for (int i=0; i<10; ++i)
-    threads[i] = std::thread(print_thread_id,i+1);
+    // spawn 10 threads:`
+    for (int i = 0; i < 10; ++i)
+        threads[i] = std::thread(
+            print_thread_id,i+1
+        );
 
-    for (auto& th : threads) th.join();
+    for (auto& th : threads) 
+        th.join();
 
     return ;
 }
@@ -307,7 +310,7 @@ int main()
     ASyncProcess<std::function<int(int)>,int,int> process([](int p) -> int{
         return 20;
     },result,150);
-    while(process.Finish() == false){
+    while(process.Finish() == false) {
 
     }
     std::cout<<process.Finish() << "  "<<result<<"\r\n";