public class HelloWorld{
public static void main(String[] args){
int num = 999;
int count = 0;
if (num >= 0 && num<=999999999){
while(num != 0){
num/=10;
count++;
}
System.out.println("它是个"+ count+"位的数!");
} else{
System.out.println("输入有误!");
}
下面少了两个}},代码没问题,我运行了
public class HelloWorld{
public static void main(String[] args){
int num = 999;
int count = 0;
if (num >= 0 && num<=999999999){
while(num != 0){
num/=10;
count++;
}
System.out.println("它是个"+ count+"位的数!");
}
else{
System.out.println("输入有误!");
}
}
}