无符号整数变量ux和uy的声明和初始化如下: unsigned ux=x; unsigned uy=y;若sizeof(int)=4,则对于任意int型变量x和y,判断以下表达式哪些为 i. x*4+y*8==(x<<2)+(y<<3) ii. x*y==ux*uy iii. (x*x)>=0 iv. x/4+y/8==(x>>2)+(y>>3)
A.
i 和 ii
B.
i
C.
i 和 iii
D.
全部正确
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