/in/foo.cc: In function 'int findmax(int*, int)':
/in/foo.cc:18:12: warning: 'index' may be used uninitialized [-Wmaybe-uninitialized]
   18 |     return index;
      |            ^~~~~
/in/foo.cc:8:9: note: 'index' was declared here
    8 |     int index;
      |         ^~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:33:24: warning: 'index' may be used uninitialized [-Wmaybe-uninitialized]
   33 |     cout << a[ans1] << " " << b[ans2];
      |                        ^~~
/in/foo.cc:8:9: note: 'index' was declared here
    8 |     int index;
      |         ^~~~~
/in/foo.cc:33:37: warning: 'index' may be used uninitialized [-Wmaybe-uninitialized]
   33 |     cout << a[ans1] << " " << b[ans2];
      |                                     ^
/in/foo.cc:8:9: note: 'index' was declared here
    8 |     int index;
      |         ^~~~~