Difference between malloc/free and new/delete

Malloc and free are standard library functions in C ++/C, and new/delete are operators in C ++. They can be used to apply for and release dynamic memory.

 

For non-Internal data objects, using malloc/free alone cannot meet the requirements of dynamic objects. The constructor must be automatically executed when the object is created, and the Destructor must be automatically executed before the object is extinct. Since malloc/free is a library function rather than an operator and is not controlled by the compiler, it is impossible to impose the tasks of executing constructor and destructor on malloc/free.

 

Therefore, the C ++ language requires a new operator capable of dynamic memory allocation and initialization, and a delete operator capable of cleaning and releasing memory. New/delete is not a database function, but an operator.