foo.cc: In function ‘int main()’:
foo.cc:14:17: warning: ‘max’ may be used uninitialized [-Wmaybe-uninitialized]
   14 |                 if(a[i]>=max){
      |                 ^~
foo.cc:7:19: note: ‘max’ was declared here
    7 |     int n,geshu=0,max;
      |                   ^~~