View Compilation Error

0_0_28791340_22619.cpp: In function 'void getnext()':
0_0_28791340_22619.cpp:18:7: error: 'nex' was not declared in this scope
       nex[0]=-1;
       ^
0_0_28791340_22619.cpp: In function 'int main()':
0_0_28791340_22619.cpp:41:14: error: 'nex' was not declared in this scope
       int ss=nex[strlen(p)];
              ^