What is wrong with this code ?

Question

#include<iostream>
using namespace std;

main()
{

long var=10;
long x=0;

while(x<=10)
{

var=var-x; //var-=x;
++x;
cout<<var;
}

}

Answer 1

Missing int type declaration on main().
Missing return statement at end of main().
(Optional) Missing newline or std::endl or other textual separator, like space or comma, at end of cout stream.