/in/foo.cc: In function 'int main()':
/in/foo.cc:27:6: warning: 'l' may be used uninitialized in this function [-Wmaybe-uninitialized]
  a[l]=k;
  ~~~~^~
/in/foo.cc:26:6: warning: 'h' may be used uninitialized in this function [-Wmaybe-uninitialized]
  a[h]=a[l];
  ~~~~^~~~~