View Compilation Error

0_0_30574570_29616.cpp:3:13: error: 'll' was not declared in this scope
 long long f(ll x,ll y,ll &gcd,ll &c)
             ^
0_0_30574570_29616.cpp:3:18: error: 'll' was not declared in this scope
 long long f(ll x,ll y,ll &gcd,ll &c)
                  ^
0_0_30574570_29616.cpp:3:23: error: 'll' was not declared in this scope
 long long f(ll x,ll y,ll &gcd,ll &c)
                       ^
0_0_30574570_29616.cpp:3:27: error: 'gcd' was not declared in this scope
 long long f(ll x,ll y,ll &gcd,ll &c)
                           ^
0_0_30574570_29616.cpp:3:31: error: 'll' was not declared in this scope
 long long f(ll x,ll y,ll &gcd,ll &c)
                               ^
0_0_30574570_29616.cpp:3:35: error: 'c' was not declared in this scope
 long long f(ll x,ll y,ll &gcd,ll &c)
                                   ^
0_0_30574570_29616.cpp:3:36: error: expression list treated as compound expression in initializer [-fpermissive]
 long long f(ll x,ll y,ll &gcd,ll &c)
                                    ^
0_0_30574570_29616.cpp:4:1: error: expected ',' or ';' before '{' token
 {
 ^