填空題

下列程序的運行結(jié)果是()。 
Program main 
 implicit none
 integer ::a=1
   integer ::b=2
 call add ( a )
   Call add ( b)
 Write(*,*) a , b
 Stop
  end 
Subroutine  add (sum) 
Implicit none 
integer :: sum
   sum=sum+1 
Return 
end 

答案: 2,3
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