/in/foo.cc: In function 'int main()':
/in/foo.cc:11:15: warning: 'i' is used uninitialized [-Wuninitialized]
   11 |         while(i)
      |               ^
/in/foo.cc:5:35: note: 'i' was declared here
    5 |         int aa,bb,b1,a1,b2,a2,a,b,i;
      |                                   ^