Differences between malloc and new

1. malloc and free are standard library functions of C ++/C, and new/delete are operators of C ++. They can be used to apply for dynamic memory and release memory.
2. For non-Internal data objects, the use of maloc/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.
3. Therefore, the C ++ language requires a new operator that can complete dynamic memory allocation and initialization, and a delete operator that can clean up and release memory. Note that new/delete is not a database function.
4. c ++ programs often call C functions, while C Programs can only use malloc/free to manage dynamic memory.

5. New can be considered as the execution of the malloc and constructor. The new pointer directly carries the type information. Malloc returns the void pointer.

1. New Delete is an operator, malloc and free are functions.

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

For non-Internal data objects, maloc/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 that can complete dynamic memory allocation and initialization, and a delete operator that can clean up and release memory. Note that new/delete is not a database function.

Differences between malloc and new