变量dx、dy和dz的声明和初始化如下: double dx = (double) x; double dy = (double) y; double dz = (double) z; 若float和double分别采用IEEE 754单精度和双精度浮点数格式,sizeof(int)=4,则对于任意int型变量x、y和z,以下哪个关系表达式是永真的?
A.dx*dx >= 0
B.(double)(float) x == dx
C.dx+dy == (double) (x+y)
D.(dx+dy)+dz == dx+(dy+dz)
E.dx*dy*dz == dz*dy*dx
F.dx/dx == dy/dy
- · 有5位网友选择 A,占比45.45%
- · 有3位网友选择 E,占比27.27%
- · 有2位网友选择 D,占比18.18%
- · 有1位网友选择 C,占比9.09%