View Compilation Error

0_0_32047953_13495.cpp: In function 'int Matrixmatrixmul(Matrix, Matrix)':
0_0_32047953_13495.cpp:61:14: error: cannot convert 'Matrix' to 'int' in return
       return c;
              ^
0_0_32047953_13495.cpp: In function 'Matrix quickpow(long long int)':
0_0_32047953_13495.cpp:79:34: error: 'matrixmul' was not declared in this scope
                 b = matrixmul(b,m);
                                  ^
0_0_32047953_13495.cpp:83:30: error: 'matrixmul' was not declared in this scope
              m =matrixmul(m,m);
                              ^
0_0_32047953_13495.cpp: In function 'int main()':
0_0_32047953_13495.cpp:103:1: error: expected primary-expression before '/' token
 /    while(cin>>n>>x>>y)
 ^
0_0_32047953_13495.cpp:103:6: error: expected primary-expression before 'while'
 /    while(cin>>n>>x>>y)
      ^