View Compilation Error

0_0_32521893_6474.cpp: In function 'void Getntval()':
0_0_32521893_6474.cpp:8:2: error: 'nt' was not declared in this scope
  nt[0] = -1;
  ^
0_0_32521893_6474.cpp: In function 'void KmpSearch()':
0_0_32521893_6474.cpp:51:8: error: 'nt' was not declared in this scope
    j = nt[j];
        ^