public class HelloWorld{
public static void main(String[] args){
int num = 999;
int count = 0;
for(int i=1;num>=i;i*=10,count++){
}System.out.println("它是个"+count+"位的数!");
}
}
public class HelloWorld{
public static void main(String[] args){
int num = 999;
int count = 0;
if(num>=0&&num<=999999999){
while(num!=0){
count++;
num/=10;
}
System.out.println("它是个"+count+"位的数");
}else{
System.out.println("输入有误!");
}
}
}
哈哈哈,我刚发现我看答案也提示错误~我跳过了啊。。。