View Compilation Error

0_0_22559989_19847.cpp: In function 'void mul(uint (*)[888], uint (*)[888], uint (*)[888])':
0_0_22559989_19847.cpp:68:34: error: invalid initialization of reference of type 'int&' from expression of type 'uint {aka unsigned int}'
                     int &p=c[i][j];
                                  ^