View Compilation Error

0_0_38495145_13579.cpp: In function 'int main()':
0_0_38495145_13579.cpp:9:20: error: 'long long' invalid for 'a'
   double long long a,b,c,d;cin>>a>>b>>c>>d;
                    ^
0_0_38495145_13579.cpp:9:22: error: 'long long' invalid for 'b'
   double long long a,b,c,d;cin>>a>>b>>c>>d;
                      ^
0_0_38495145_13579.cpp:9:24: error: 'long long' invalid for 'c'
   double long long a,b,c,d;cin>>a>>b>>c>>d;
                        ^
0_0_38495145_13579.cpp:9:26: error: 'long long' invalid for 'd'
   double long long a,b,c,d;cin>>a>>b>>c>>d;
                          ^