Use new operator to initialise an array

问题

I want to initialise an array in the format that uses commas to separate the elements surrounded in curly braces e.g:

int array[10]={1,2,3,4,5,6,7,8,9,10};

However, I need to use the new operator to allocate the memory e.g:

int *array = new int[10];

Is there a way to combine theses methods so that I can allocate the memory using the new operator and initialise the array with the curly braces ?

回答1:

You can use memcpy after the allocation.

int originalArray[] ={1,2,3,4,5,6,7,8,9,10};
int *array = new int[10];
memcpy(array, originalArray, 10*sizeof(int) );

I'm not aware of any syntax that lets you do this automagically.

Much later edit:

const int *array = new int[10]{1,2,3,4,5,6,7,8,9,10};

回答2:

In the new Standard for C++ (C++11), you can do this:

int* a = new int[10] { 1,2,3,4,5,6,7,8,9,10 };

It's called an initializer list. But in previous versions of the standard that was not possible.

The relevant online reference with further details (and very hard to read) is here. I also tried it using GCC and the --std=c++0x option and confirmed that it works indeed.

来源：https://stackoverflow.com/questions/9603696/use-new-operator-to-initialise-an-array