diff --git a/tests/examples/c/apitest.c b/tests/examples/c/apitest.c
index e08d667d6be42bef3dc4e058fab10ac68f0809e0..930a6075cae2767c0d50ca2e1574d6441430d1b3 100644
--- a/tests/examples/c/apitest.c
+++ b/tests/examples/c/apitest.c
@@ -467,7 +467,6 @@ int main(int argc, char *argv[]) {
   const char* passwd = "taosdata";
 
   taos_options(TSDB_OPTION_TIMEZONE, "GMT-8");
-  taos_init();
 
   TAOS* taos = taos_connect(host, user, passwd, "", 0);
   if (taos == NULL) {
diff --git a/tests/examples/c/asyncdemo.c b/tests/examples/c/asyncdemo.c
index be3a908f11748a5ac414157bef6b9caed389b303..16a14e96549c5cd66f747ae0c6c63f20c3e7fbfa 100644
--- a/tests/examples/c/asyncdemo.c
+++ b/tests/examples/c/asyncdemo.c
@@ -99,8 +99,6 @@ int main(int argc, char *argv[])
   tableList = (STable *)malloc(size);
   memset(tableList, 0, size);
 
-  taos_init();
-
   taos = taos_connect(argv[1], "root", "taosdata", NULL, 0);
   if (taos == NULL)
     taos_error(taos);
diff --git a/tests/examples/c/demo.c b/tests/examples/c/demo.c
index 0b12c3d3eabaf9a17ba0859c73e794f2e973dc3b..3853d81fb251809e1e6b18ffa1fad5c8ca882d16 100644
--- a/tests/examples/c/demo.c
+++ b/tests/examples/c/demo.c
@@ -61,11 +61,6 @@ int main(int argc, char *argv[]) {
     return 0;
   }
 
-  // init TAOS
-  if (taos_init()) {
-    exit(1);
-  }
-  
   TAOS *taos = taos_connect(argv[1], "root", "taosdata", NULL, 0);
   if (taos == NULL) {
     printf("failed to connect to server, reason:%s\n", "null taos"/*taos_errstr(taos)*/);
diff --git a/tests/examples/c/makefile b/tests/examples/c/makefile
index 7293a22c11d7c6049c220ca0951b5969fa344114..b06fe551dbde4b16e3ea197ca4c2bc1711ef63bb 100644
--- a/tests/examples/c/makefile
+++ b/tests/examples/c/makefile
@@ -6,7 +6,7 @@ TARGET=exe
 LFLAGS = '-Wl,-rpath,/usr/local/taos/driver/' -ltaos -lpthread -lm -lrt
 CFLAGS = -O3 -g -Wall -Wno-deprecated -fPIC -Wno-unused-result -Wconversion \
 	-Wno-char-subscripts -D_REENTRANT -Wno-format -D_REENTRANT -DLINUX \
-	-msse4.2 -Wno-unused-function -D_M_X64 -I/usr/local/taos/include -std=gnu99
+	-Wno-unused-function -D_M_X64 -I/usr/local/taos/include -std=gnu99
 
 all: $(TARGET)
 
diff --git a/tests/examples/c/prepare.c b/tests/examples/c/prepare.c
index bd650ed64b838d92a03bb5e023c2ca91ac5e2c2e..13d71beea6156aa32677c20ccc2d222d28826b24 100644
--- a/tests/examples/c/prepare.c
+++ b/tests/examples/c/prepare.c
@@ -22,12 +22,6 @@ int main(int argc, char *argv[])
     return 0;
   }
 
-  // init TAOS
-  if (taos_init()) {
-    printf("failed to init taos\n");
-    exit(1);
-  }
-
   taos = taos_connect(argv[1], "root", "taosdata", NULL, 0);
   if (taos == NULL) {
     printf("failed to connect to db, reason:%s\n", taos_errstr(taos));
diff --git a/tests/examples/c/stream.c b/tests/examples/c/stream.c
index e3053d1969b169767904d595c6ed5615e9d46ce5..30a790f061cd8ef2b870a371c2cadfb0e2a413c1 100644
--- a/tests/examples/c/stream.c
+++ b/tests/examples/c/stream.c
@@ -54,12 +54,6 @@ int main(int argc, char *argv[])
     exit(0);
   } 
 
-  // init TAOS
-  if (taos_init()) {
-    printf("failed to init taos\n");
-    exit(1);
-  }
-
   strcpy(db_name, argv[2]);
   strcpy(tbl_name, argv[3]);
   
diff --git a/tests/examples/c/subscribe.c b/tests/examples/c/subscribe.c
index 5a402976241133dcef219cb64be7b3492e464aac..1d3533fa5ee89f7425a9b0563e738b4e0703e6c8 100644
--- a/tests/examples/c/subscribe.c
+++ b/tests/examples/c/subscribe.c
@@ -216,12 +216,6 @@ int main(int argc, char *argv[]) {
     }
   }
 
-  // init TAOS
-  if (taos_init()) {
-    printf("failed to init taos\n");
-    exit(1);
-  }
-
   TAOS* taos = taos_connect(host, user, passwd, "", 0);
   if (taos == NULL) {
     printf("failed to connect to db, reason:%s\n", taos_errstr(taos));