View Compilation Error

0_0_38931322_23033.cpp: In function 'int main()':
0_0_38931322_23033.cpp:28:32: error: 'cmp2' was not declared in this scope; did you mean 'cmp1'?
   28 |                 sort(b+1,b+n+1,cmp2);
      |                                ^~~~
      |                                cmp1