const int and delcaration of an array

[SGSpecialK]

I'm writing a program and it has to do with an array. I have to let the user decide the size of the array,but when I code this,
int combined;
cin >> combined;
const int SIZE= combined;
int array[SIZE];
the compiler gives me an error. I also tried this
const int SIZE;
cin >> SIZE;
int array[SIZE];
How can I declare and array of a size decided by the user?