Find the error in C++ program

This C++ program is not compiling. What do you think is the error with the program?

#include<iostream>
using namespace std;
int main()
{
   int arr[10];
   arr={1,2,3,4,5,6,7,8};
   cout<<"arr[0]="<<arr[0];
   return 0;
}

Is the error due to

1. Not using printf
2. Initialising the array with only 8 elements instead of 10
3. Initialising array in the next statement instead of in definition.
4. None of the above

 Now if you like this question, there are plenty more questions like this and programs and notes in my app Simplified C++.

Download the Simplif ied C++  by Hegdeapps now

By the way the correct answer is (3)