判断位数问题

个回答

慕虎8249717

2017-02-19 23:33:28

package imooc.com;
import java.util.Scanner;
public class Demo3 {
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
System.out.println("***请输入一个判断位的数***");
long num=input.nextLong();
long i=10;
long count=1;
while((num/i)!=0)
{
i*=10;
count++;
}
System.out.println("输入实数位数为："+count);
}
}

1
起个名字真难啊是吧

2017-02-19 22:11:39

public class HelloWorld{
public static void main(String[] args){
long num = 999999999999l;
int count = 0;
if(num>=0 ){
    do{
        count++;
        num=num/10;
    }
    while (num>0);
    System.out.println("它是个"+count+"位的数！");
    }
else
System.out.println("输入数据错误");
}
}

0
qq_随心_57

2017-02-19 22:07:17

public class HelloWorld{
public static void main(String[] args){
long num = 999999999999l;
int count = 0;
do{
count++;
num=num/10;
}while(num>0);
System.out.println("它是个"+count+"位的数！");
}
}

1

起个名字真难啊是吧: 2017-02-19 22:03:40

public class HelloWorld{
public static void main(String[] args){
long int num = 999999999999;
int count = 0;
if(num>=0 ){
    do{
        count++;
        num=num/10;
    }
    while (num>0);
    System.out.println("它是个"+count+"位的数！");
    }
else
System.out.println("输入数据错误");
}
}