单项选择题

阅读下列程序
public class VariableUse
public static void main(string[]args)
int a;
if(a==8)
int b=9;
System. out. println("a="+a);
System. out. println("b="+b);

System. out. println("a="+a);
System. out. println("b="+b);


该程序在编译时的结果是______。