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[单选题]
下面程序执行后的输出结果是()。#includestructT{intaintb}voidswap(structT*v)voidmain(){structTx[2]={10,20,30,40}swap(x)printf("%d,%d,%d,%d/n",x[0].a,x[0].b,x[1].a,x[1].b)}voidswap(structT*v){structTtt=*v*v=*(v+1)*(v+1)=t}
A.10,20,30,40
B.20,10,40,30
C.40,30,20,10
D.30,40,10,20
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