View Compilation Error

0_0_16911991_31632.cpp: In function 'node mul(node&, node&)':
0_0_16911991_31632.cpp:22:37: error: expected primary-expression at end of input
                 t.a[i][j]+=(a.a[i][k%
                                     ^
0_0_16911991_31632.cpp:22:37: error: expected ']' at end of input
0_0_16911991_31632.cpp:22:37: error: expected ')' at end of input
0_0_16911991_31632.cpp:22:37: error: expected '}' at end of input
0_0_16911991_31632.cpp:22:37: error: expected '}' at end of input
0_0_16911991_31632.cpp:22:37: error: expected '}' at end of input
0_0_16911991_31632.cpp:22:37: error: expected '}' at end of input