A.1 B.6.0 C.2.0 D.1.0
A.x%(-3) B.w+=-2 C.k=(a=2,b=3,a+B. D.a+=a-=(b=4)*(a=3)
A.’a’<=c1<=’z’ B.(c1>=A.&&(c1<=’z’) C.(’a’>=c1)||(’z’<=c1) D.(c1>=’a’)&&(c1<=’z’)