foo.cc: In function 'int maxa(int*, int)':
foo.cc:8:16: warning: 'xia' may be used uninitialized [-Wmaybe-uninitialized]
    8 |         return xia;
      |                ^~~
foo.cc:4:25: note: 'xia' was declared here
    4 |         int ans=INT_MIN,xia;
      |                         ^~~
foo.cc: In function 'int main()':
foo.cc:20:29: warning: 'xia' may be used uninitialized [-Wmaybe-uninitialized]
   20 |         cout<<a[x]<<' '<<a[x]+1<<endl;
      |                          ~~~^
foo.cc:4:25: note: 'xia' was declared here
    4 |         int ans=INT_MIN,xia;
      |                         ^~~

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