View Compilation Error

0_0_31340189_29353.cpp: In function 'Matrix quick_pow(Matrix&, int)':
0_0_31340189_29353.cpp:29:20: error: expected primary-expression before '%' token
         x=mul(x,x);%
                    ^
0_0_31340189_29353.cpp:29:20: error: expected primary-expression at end of input
0_0_31340189_29353.cpp:29:20: error: expected '}' at end of input
0_0_31340189_29353.cpp:29:20: error: expected '}' at end of input