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#include <iostream>
 
class TestObject
{
public:
    TestObject();
    ~TestObject();
    int getTestVariable();
 
private:
    int testVariable = 9999;
};
 
TestObject testTestObject1()
{
    TestObject testObject;
    std::cout<<"(INSIDE FUNCTION) ADDRESS OF TESTOBJECT: "<<&testObject<<std::endl;
    std::cout<<"(INSIDE FUNCTION) TESTOBJECT.VARIABLE: "<<testObject.getTestVariable()<<std::endl;
    return testObject;
}
 
TestObject* testTestObject2()
{
    TestObject testObject;
    std::cout<<"(INSIDE FUNCTION) RETURN (ADDRESS OF TESTOBJECT): "<<&testObject<<std::endl;
    std::cout<<"(INSIDE FUNCTION) TESTOBJECT.VARIABLE: "<<testObject.getTestVariable()<<std::endl;
    return &testObject;
}
 
int main()
{
    TestObject tObject1 = testTestObject1();
    std::cout << tObject1.getTestVariable() << std::endl;
    std::cout << "(IN MAIN) ADDRESS OF (TESTOBJECT): " << &tObject1 << std::endl;
 
    TestObject* tObject2 = testTestObject2();
    std::cout << tObject2->getTestVariable() << std::endl;
    std::cout << "(IN MAIN) TESTOBJECT POINTER: " << tObject2 << std::endl;
}

prog.cpp: In function 'TestObject* testTestObject2()':
prog.cpp:24:16: warning: address of local variable 'testObject' returned [-Wreturn-local-addr]
     TestObject testObject;
                ^
/home/09Ell4/cc44jsbF.o: In function `testTestObject1()':
prog.cpp:(.text+0xe): undefined reference to `TestObject::TestObject()'
prog.cpp:(.text+0x6d): undefined reference to `TestObject::getTestVariable()'
prog.cpp:(.text+0x14d): undefined reference to `TestObject::~TestObject()'
/home/09Ell4/cc44jsbF.o: In function `testTestObject2()':
prog.cpp:(.text+0x16e): undefined reference to `TestObject::TestObject()'
prog.cpp:(.text+0x1cd): undefined reference to `TestObject::getTestVariable()'
prog.cpp:(.text+0x22a): undefined reference to `TestObject::~TestObject()'
prog.cpp:(.text+0x2b9): undefined reference to `TestObject::~TestObject()'
/home/09Ell4/cc44jsbF.o: In function `main':
prog.cpp:(.text.startup+0x1e): undefined reference to `TestObject::getTestVariable()'
prog.cpp:(.text.startup+0x68): undefined reference to `TestObject::getTestVariable()'
prog.cpp:(.text.startup+0xa7): undefined reference to `TestObject::~TestObject()'
prog.cpp:(.text.startup+0xc2): undefined reference to `TestObject::~TestObject()'
collect2: error: ld returned 1 exit status

Standard output is empty