View Compilation Error

0_0_39382512_4399.cpp: In function 'void kmp(std::string, std::string)':
0_0_39382512_4399.cpp:22:17: error: 'pointer' was not declared in this scope
   22 |         getnext(pointer,plen);
      |                 ^~~~~~~
0_0_39382512_4399.cpp:27:14: error: 'i' was not declared in this scope
   27 |         if(s[i]==p[j])j++;
      |              ^