foo.cpp: In function 'int main()':
foo.cpp:5:17: error: expected initializer before 'a'
  long long inta a,b;
                 ^
foo.cpp:6:7: error: 'a' was not declared in this scope
  cin>>a>>b;
       ^
foo.cpp:6:10: error: 'b' was not declared in this scope
  cin>>a>>b;
          ^