/in/foo.cc:3:23: error: 'INT_MIN' was not declared in this scope
 int a[10005],i,n,maxn=INT_MIN,max_xb;
                       ^~~~~~~
/in/foo.cc: In function 'int findmax()':
/in/foo.cc:18:4: error: 'max_xb' was not declared in this scope
    max_xb=i;
    ^~~~~~
/in/foo.cc:22:9: error: 'max_xb' was not declared in this scope
  return max_xb;
         ^~~~~~