View Compilation Error

0_0_20347014_2521.cpp: In function 'void getMu(int)':
0_0_20347014_2521.cpp:38:3: error: 'mu' was not declared in this scope
   mu[i]=1;
   ^
0_0_20347014_2521.cpp:40:6: error: 'mu' was not declared in this scope
   if(mu[i]==0)continue;
      ^
0_0_20347014_2521.cpp:41:3: error: 'mu' was not declared in this scope
   mu[i]=-mu[i];
   ^