下列程序段的输出结果 Clearstore10toastore20toB.setudfparmstoreferencedoswapwitha,(b
下列程序段的输出结果
Clear
store 10 to a
store 20 to B.
set udfparms to reference
do swap with a,(b)
a,b
procedure swap
parameters x1,x2
temp=X1
x1=x2
x2=temp
endproc
A.10 20
B.20 20
C.20 10
D.10 10