若x和y是已定义过的整型变量，则语句 if（x=0) y=0; 表达的含义是：若x=0，则y=0。

A.3.75

B.3

C.2.75

D.2

A.5.5

B.5

C.3

D.4.0

A.a=a++=5;

B.++i;

C.a==1

D.a++=i;

A.1

B.2

C.2.0

D.2.5

A.y==0

B.y!=1

C.y!=0

D.y==1

A.a=x;

B.12=a;

C.x=10;

D.x+1=3;

A.if(x!=0) y=1; else y=2;

B.if(x!=0) y=1 else y=2;

C.if(x!=0) then y=1 else y=2;

D.if x!=0 y=1; else y=2;

A.if(x==0) y=1; else y=2;

B.if(x==0) then y=1 else y=2;

C.if(x==0) y=1 else y=2;

D.if x==0 y=1; else y=2;