foo.cc: In function 'int main()':
foo.cc:16:26: warning: 'e' may be used uninitialized [-Wmaybe-uninitialized]
   16 |                         e=e+1;
      |                         ~^~~~
foo.cc:6:21: note: 'e' was declared here
    6 |         int a,b,c,d,e;
      |                     ^

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