/in/foo.cc: In function 'int main()':
/in/foo.cc:54:3: warning: 'bn2' may be used uninitialized in this function [-Wmaybe-uninitialized]
 jg=bn/bn2;
 ~~^~~~~~~
/in/foo.cc:54:3: warning: 'bn' may be used uninitialized in this function [-Wmaybe-uninitialized]