test23.cpp: In constructor 'Object1::Object1(Data1*)':
test23.cpp:55:24: warning: Using variable 'this->dataptr' without checking for null pointer
         dataptr->ftest1();
                        ^
test23.cpp: In constructor 'Object1::Object1(Data1*)':
test23.cpp:55:24: warning: Using variable 'this->dataptr' without checking for null pointer
test23.cpp: In member function 'void Object1::func3(Data1*)':
test23.cpp:81:25: warning: Using variable 'ptr1' without checking for null pointer
             ptr1->ftest1();
                         ^
test23.cpp: In member function 'void Object1::func5(Data1*)':
test23.cpp:99:25: warning: Using variable 'ptr1' without checking for null pointer
             ptr1->ftest1();
                         ^
test23.cpp: In member function 'void Object1::func6(FuncPtr1)':
test23.cpp:105:13: warning: Using variable 'ptr1' without checking for null pointer
         ptr1();
             ^
test23.cpp: In member function 'void Object1::func8(Data1*)':
test23.cpp:117:28: warning: Using variable 'ptr1' without checking for null pointer
         (ptr1->*fptr2)(ptr1);
                            ^
test23.cpp:117:23: warning: Using variable 'ptr1' without checking for null pointer
         (ptr1->*fptr2)(ptr1);
                       ^
test23.cpp: In member function 'void Object1::func10(Data1*, Data1*)':
test23.cpp:128:28: warning: Using variable 'ptr1' without checking for null pointer
         (ptr1->*fptr2)(ptr2);
                            ^
test23.cpp:128:23: warning: Using variable 'ptr1' without checking for null pointer
         (ptr1->*fptr2)(ptr2);
                       ^