谁知道这代码为什么不对？
public class HelloWorld{
public static void main(String[] args){
int num = 999;
int count = 0;
do
{
count++;
num=num/10;
}
while(num>0);
System.out.println('它是个' +count +'位的数！');
}
}
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public class HelloWorld{
public static void main(String[] args){
int num = 999;
int count = 0;
do
{
count++;
num=num/10;
}
while(num>0);
System.out.println('它是个' +count +'位的数！');
}
}
2016-01-31
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