View Compilation Error

0_0_29773006_13496.cpp:5:10: error: 'll' was not declared in this scope
 bool M_L(ll a, ll n)//判断n是否是素数
          ^
0_0_29773006_13496.cpp:5:16: error: 'll' was not declared in this scope
 bool M_L(ll a, ll n)//判断n是否是素数
                ^
0_0_29773006_13496.cpp:5:20: error: expression list treated as compound expression in initializer [-fpermissive]
 bool M_L(ll a, ll n)//判断n是否是素数
                    ^
0_0_29773006_13496.cpp:6:1: error: expected ',' or ';' before '{' token
 {
 ^