is it necessary to type

 

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Do I cast the result of malloc?

I was googling to find out the reason for type-casting of malloc and calloc . But, i only found type-casting of malloc is not necessary since it return void pointer but, what about calloc . This is the same reason for calloc too ???

Now, if we move back to first point, about return value of malloc and calloc . Then, i found that, both are returning the allocated spaces. So, i'm little bit confused here. So, my questions are

  • What is the return value of malloc and calloc

  • Is it necessary to type-cast malloc and calloc . And why ?

    • What is the return value of malloc and calloc?

    It is a pointer to void ( void* ).

    Is it necessary to type-cast malloc and calloc. And why ?

    No, because the conversion from a pointer to void to a pointer to object is implicit.

    C11 (n1570), § 6.3.2.3 Pointers
    A pointer to void may be converted to or from a pointer to any object type.

    It is right for both malloc and calloc .

    malloc()或calloc()返回void * ，它可以分配给任何指针类型。在C中，不需要对void*进行类型转换，因为它是由编译器隐式地完成的。但是在c ++中，如果你不会强制转换

    The return value of malloc and calloc is a void* . The address of the heap memory space allocated by these functions.

    Both functions allocate memory. The only difference between them is that

  • malloc simply allocates memory.
  • calloc allocates the memory and initializes it to 0.

    • In C its not recommended to cast the return value of these functions.

    In C++ it is mandatory to cast.

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