diff --git a/libpurgeablemem/cpp/include/purgeable_mem_base.h b/libpurgeablemem/cpp/include/purgeable_mem_base.h
index b11133ff3a0267bddb611e1306fe9eabf2aaeb31..caa36bc007c2732532bcaad29dc28551679030ab 100644
--- a/libpurgeablemem/cpp/include/purgeable_mem_base.h
+++ b/libpurgeablemem/cpp/include/purgeable_mem_base.h
@@ -101,10 +101,10 @@ public:
 
 protected:
     void *dataPtr_ = nullptr;
-    size_t dataSizeInput_;
+    size_t dataSizeInput_ = 0;
     std::unique_ptr<PurgeableMemBuilder> builder_ = nullptr;
     std::shared_mutex rwlock_;
-    unsigned int buildDataCount_;
+    unsigned int buildDataCount_ = 0;
     bool BuildContent_();
     bool IfNeedRebuild_();
     virtual bool Pin_();
diff --git a/libpurgeablemem/cpp/src/purgeable_mem.cpp b/libpurgeablemem/cpp/src/purgeable_mem.cpp
index 2d9fcf276e9e44dc9ee4783618d18cb0b6b40187..254ff0942917bcad84939a5a78d934edc0b38ff1 100644
--- a/libpurgeablemem/cpp/src/purgeable_mem.cpp
+++ b/libpurgeablemem/cpp/src/purgeable_mem.cpp
@@ -83,8 +83,9 @@ bool PurgeableMem::CreatePurgeableData_()
     PM_HILOG_DEBUG(LOG_CORE, "%{public}s", __func__);
     pageTable_ = nullptr;
     size_t size = RoundUp_(dataSizeInput_, PAGE_SIZE);
-    int type = MAP_ANONYMOUS;
-    type |= (UxpteIsEnabled() ? MAP_PURGEABLE : MAP_PRIVATE);
+    unsigned int utype = MAP_ANONYMOUS;
+    utype |= (UxpteIsEnabled() ? MAP_PURGEABLE : MAP_PRIVATE);
+    int type = static_cast<int>(utype);
 
     dataPtr_ = mmap(nullptr, size, PROT_READ | PROT_WRITE, type, -1, 0);
     if (dataPtr_ == MAP_FAILED) {
diff --git a/libpurgeablemem/test/purgeable_cpp_test.cpp b/libpurgeablemem/test/purgeable_cpp_test.cpp
index c23f67520756286b7cccd38b1aad3b49ae5f33c5..5813b2b6c0a74eb1b22ef1f300f6a3e999af73e2 100644
--- a/libpurgeablemem/test/purgeable_cpp_test.cpp
+++ b/libpurgeablemem/test/purgeable_cpp_test.cpp
@@ -381,7 +381,7 @@ HWTEST_F(PurgeableCppTest, MutiPageReadWriteTest, TestSize.Level1)
 HWTEST_F(PurgeableCppTest, MutiMorePageReadWriteTest, TestSize.Level1)
 {
     size_t size = 5 * 1024 * 1024;
-    char *alphabet = (char *)malloc(size);
+    char *alphabet = static_cast<char *>(malloc(size));
     size_t len = 0;
     for (char ch = 'D'; len < size;) {
         alphabet[len++] = ch;