View Compilation Error

0_0_39355314_24987.cpp: In function 'Matrix M_qpow(Matrix, int)':
0_0_39355314_24987.cpp:22:13: error: 'ans' was not declared in this scope; did you mean 'abs'?
   22 |      memset(ans.v,0,sizeof ans.v);
      |             ^~~
      |             abs