A.if (a=b)x=x+1;B.if (a< >b)x=x+1;C.if (a-b)x=x+1;D.if (x )x=x+1;
A.2,2B.0,2C.0,0D.2,0
A.b=a/4B.b=a-8C.b=a/4.0D.b=a%4