View Compilation Error

0_0_20637250_18980.cpp: In function 'void getNext()':
0_0_20637250_18980.cpp:15:13: error: 'p' was not declared in this scope
   if(k==-1||p[j]==p[k])
             ^
0_0_20637250_18980.cpp: In function 'int kmp()':
0_0_20637250_18980.cpp:32:13: error: 's' was not declared in this scope
   if(j==-1||s[i]==p[j])
             ^
0_0_20637250_18980.cpp:32:19: error: 'p' was not declared in this scope
   if(j==-1||s[i]==p[j])
                   ^