What does the g++ compiler message mean when working with arrays?

Question

Programming

Good day, I'm practicing with arrays in C ++. In general, it gives the following warning:
prg.cpp: In function 'int main()':
prg.cpp:9:11: warning: extended initializer lists only available with -std=c++11 or -std=gnu++11 [ enabled by default]
int num[8]
The code itself is:
#include
#include
using namespace std;
int main()
{
int num[8]
{
1, 5, 4, 2, 7, 2, 1, 3
};
int a;
a = -1;
while (a < 7)
{
a++;
cout << num[a] << endl;
}
return 0;
}
Thanks in advance to all who answered!

Answer 1

From which book did you accumulate and paste the pieces? Did you enter a message into Google? Have you tried to translate?
It is written in white and white English - you are trying to use features from C ++ 11, but the compiler was not told about it.
And even the decision is written - the option needs to be added.

Answer 2

Place an = symbol between the array declaration and the array body specification. And use code formatting here. It's a button with three dots in the editor.
should be like this:

int num[8] =
{
1, 5, 4, 2, 7, 2, 1, 3
};