New and delete

Dynamic memory allocation in C/C++ refers to performing memory allocation manually by a programmer. Dynamically allocated memory is allocated on Heap, and non-static and local variables get memory allocated on Stack.

new operator:

The new operator denotes a request for memory allocation on the Free Store. If sufficient memory is available, a new operator initializes the memory and returns the address of the newly allocated and initialized memory to the pointer variable.

delete operator:

Since it is the programmer’s responsibility to deallocate dynamically allocated memory, programmers are provided delete operator in C++ language.

Syntax to use new && delete operator

class Student {
	private:
	    std::string _login;
		
	public:
	    Student() : _login("default") {
			std::cout << "Student " << this->_login << " is born" << std::endl;
		}
		~Student() {
			std::cout << "Student " << this->_login << " died" << std::endl;
		}
};

int main(void) {
    // Then request memory for the variable
    Student* = new student("jmartin");
	
	// deallocate dynamically allocated
	delete student;
}