Category : destructor

English is not my native language,so please forgive me for my grammar problems. When I run my program, I find that class constructors are called when defining objects and explicitly calling constructors。After calling the constructor and after leaving the scope, the destructor is called twice。 #include<iostream> class test { private: int a; int b; int ..

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i am wondering why if i have code like this: class Test2 { public: Test2() { std::cout << "TEST2 Constructorn"; } ~Test2() { std::cout << "TEST2 Destructorn"; } }; class Test { public: static Test2& get() { static Test2 test{}; return test; } }; int main() { auto test = Test::get(); std::cout << "Createdn"; auto ..

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Mostly all things explained by fredoverflow(user 237K Rep.) in his Two answers https://stackoverflow.com/a/3109981/11862989 https://stackoverflow.com/a/11540204/11862989 But while implementing Move constructor and overloaded Move Assignment operator(OMAO)( I am using these short form throughout the question ) I am facing some problem that I will put here. Also there is another answer by user Greg Hewgill (user with ..

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I’m implementing encrypt/decrypt program with Crypto++ library. I made cryptopp dll and new project refer to it. And now, I am faced to crash problem in the std::string destructor. Belows are my codes. //Encrypt void Encryption(std::string encryptData, std::string& outString) { std::string plain, cipher, encoded, recovered; plain = encryptData; unsigned char key[CryptoPP::AES::DEFAULT_KEYLENGTH]; memset(key, 0x00, CryptoPP::AES::DEFAULT_KEYLENGTH); std::string ..

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.cpp #include"40.h" #include<iostream> A::A(): p(0),q(0) // O arg ctor { std::cout<<"0 arg ctorn"; } A::A(int k1,int k2): p(k1),q(k2) // 2 arg ctor { std::cout<<"2 arg ctorn"; } A::A(A &a) // copy ctor { std::cout<<"copy ctorn"; p=a.p; q=a.q; } A& A::operator=(A &a) // `OVA` { std::cout<<"overloade= operatorn"; p=a.p; q=a.q; return *this; } A::~A() // Dctor { ..

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