/in/foo.cc: In function 'int main()':
/in/foo.cc:97:32: warning: 'endlie' may be used uninitialized in this function [-Wmaybe-uninitialized]
    if(a[head].nowhang==endhang && a[head].nowlie==endlie)
       ~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
/in/foo.cc:97:4: warning: 'endhang' may be used uninitialized in this function [-Wmaybe-uninitialized]
    if(a[head].nowhang==endhang && a[head].nowlie==endlie)
    ^~
/in/foo.cc:85:14: warning: 'beginlie' may be used uninitialized in this function [-Wmaybe-uninitialized]
   a[1].nowlie=beginlie;
   ~~~~~~~~~~~^~~~~~~~~
/in/foo.cc:84:15: warning: 'beginhang' may be used uninitialized in this function [-Wmaybe-uninitialized]
   a[1].nowhang=beginhang;
   ~~~~~~~~~~~~^~~~~~~~~~