View Compilation Error

0_0_19667751_3067.cpp:5:26: error: declaration of 'map_' as multidimensional array must have bounds for all dimensions except the first
 bool shensou(char map_[][], int n, int m, int star_i, int star_j)
                          ^
0_0_19667751_3067.cpp:5:27: error: expected ')' before ',' token
 bool shensou(char map_[][], int n, int m, int star_i, int star_j)
                           ^
0_0_19667751_3067.cpp:5:29: error: expected unqualified-id before 'int'
 bool shensou(char map_[][], int n, int m, int star_i, int star_j)
                             ^