/in/foo.cc: In function 'void work()':
/in/foo.cc:150:7: warning: 'mp2' may be used uninitialized in this function [-Wmaybe-uninitialized]
   a[i]=mp2;
   ~~~~^~~~
/in/foo.cc:151:7: warning: 'mp1' may be used uninitialized in this function [-Wmaybe-uninitialized]
   b[i]=mp1;
   ~~~~^~~~