zoukankan      html  css  js  c++  java
  • [PAT] 1073 Scientific Notation (20 分)Java

    Scientific notation is the way that scientists easily handle very large numbers or very small numbers. The notation matches the regular expression [+-][1-9].[0-9]+E[+-][0-9]+ which means that the integer portion has exactly one digit, there is at least one digit in the fractional portion, and the number and its exponent's signs are always provided even when they are positive.

    Now given a real number A in scientific notation, you are supposed to print A in the conventional notation while keeping all the significant figures.

    Input Specification:

    Each input contains one test case. For each case, there is one line containing the real number A in scientific notation. The number is no more than 9999 bytes in length and the exponent's absolute value is no more than 9999.

    Output Specification:

    For each test case, print in one line the input number A in the conventional notation, with all the significant figures kept, including trailing zeros.

    Sample Input 1:

    +1.23400E-03
    

    Sample Output 1:

    0.00123400
    

    Sample Input 2:

    -1.2E+10
    

    Sample Output 2:

    -12000000000

     1 package pattest;
     2 
     3 
     4 import java.io.BufferedReader;
     5 import java.io.IOException;
     6 import java.io.InputStreamReader;
     7 import java.math.BigDecimal;
     8 
     9 /**
    10  * @Auther: Xingzheng Wang
    11  * @Date: 2019/2/26 13:04
    12  * @Description: pattest
    13  * @Version: 1.0
    14  */
    15 public class PAT1073 {
    16     public static void main(String[] args) throws IOException {
    17         BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
    18         String s = reader.readLine();
    19 
    20         BigDecimal db = new BigDecimal(s);
    21         System.out.print(db.toPlainString());
    22         reader.close();
    23     }
    24 }
  • 相关阅读:
    zedboard如何从PL端控制DDR读写(四)
    ZC706以太网扩展板接口
    软件测试作业3--Junit、hamcrest、eclemmat的安装和使用
    软件测试作业2
    软件测试作业1--描述Error
    安装Mysql 5.7.1
    Servlet生命周期+工作原理
    VS中工程的“依赖”,“库目录”,“包含目录”
    Linux C 重定向简单范例
    Java中关键字final用法
  • 原文地址:https://www.cnblogs.com/PureJava/p/10498116.html
Copyright © 2011-2022 走看看