将文字分配给指针

Question

I know there are millions of similar question on this site, but none points to the topic I am having difficulty in understanding.

I would like to assign an integral literal to an integer pointer like this:

int *p=(int []){7} //casting the literal to array so that it would return the address of first element just like string literal.

But it gives the error:

a parenthesized type followed by an initializer list is a non-standard explicit type conversion syntax.

And this code works perfectly in C.

If this type of conversion is illegal in C++ , is there any other way to achieve the same thing?

Answer 1

The syntax

int *p=(int []){7};

is supported in C99 as well C11, but not in C++.

Options in C++11:

1. Use a plain old array.

    int p[] = {7}; 

2. Use a std::array .

    std::array<int, 1> p = {7}; 

3. Use a std::vector .

    std::vector<int> p(1, 7);