View Compilation Error

0_0_14614168_12373.cpp: In function 'int main()':
0_0_14614168_12373.cpp:18:10: error: base operand of '->' is not a pointer
     p+k-2->p+f;
          ^
0_0_14614168_12373.cpp:19:8: error: base operand of '->' is not a pointer
     p+f->p+k;
        ^
0_0_14614168_12373.cpp:22:19: error: base operand of '->' is not a pointer
              p+g-2->p+g-1+1;
                   ^
0_0_14614168_12373.cpp:23:10: error: base operand of '->' is not a pointer
     p+i-1->p;
          ^