foo.cc: In function 'int main()':
foo.cc:87:15: warning: 'ans' may be used uninitialized [-Wmaybe-uninitialized]
   87 |         bubble(b,0,ans);
      |         ~~~~~~^~~~~~~~~
foo.cc:74:22: note: 'ans' was declared here
   74 |         int k = b[0],ans;
      |                      ^~~
foo.cc:65:15: warning: 'ans' may be used uninitialized [-Wmaybe-uninitialized]
   65 |         bubble(a,0,ans);
      |         ~~~~~~^~~~~~~~~
foo.cc:52:22: note: 'ans' was declared here
   52 |         int k = a[0],ans;
      |                      ^~~

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