下面代码哪里出错了?
public class HelloWorld{
public static void main(String[] args){
int num = 999;
int count = 0;
for(;num%10 !=0;){
num=num/10;
count++;
for(;num%10 !=0; ){
num=num/10;
count++;
for(;num%10 !=0; ){
num=num/10;
count++;
}
}
}
System.out.println("它是个"+count+"位数!");
}
}