2013
11-09

# Basically Speaking

The Really Neato Calculator Company, Inc. has recently hired your team to help design their Super Neato Model I calculator. As a computer scientist you suggested to the company that it would be neato if this new calculator could convert among number bases. The company thought this was a stupendous idea and has asked your team to come up with the prototype program for doing base conversion. The project manager of the Super Neato Model I calculator has informed you that the calculator will have the following neato features:
• It will have a 7-digital display.
• Its buttons will include the capital letters A through F in addition to the digits 0 through 9.
• It will support bases 2 through 16.

The input for your prototype program will consist of one base conversion per line. There will be three numbers per line. The first number will be the number in the base you are converting from. The second number is the base you are converting from. The third number is the base you are converting to. There will be one or more blanks surrounding (on either side of) the numbers. There are several lines of input and your program should continue to read until the end of file is reached.

The output will only be the converted number as it would appear on the display of the calculator. The number should be right justified in the 7-digit display. If the number is to large to appear on the display, then print “ERROR” (without the quotes) right justified in the display.

1111000  2 10
1111000  2 16
2102101  3 10
2102101  3 15
12312  4  2
1A 15  2
1234567 10 16
ABCD 16 15

    120
78
1765
7CA
ERROR
11001
12D687
D071

import java.io.*;
import java.util.*;
import java.math.*;
/**
*
* @author gongshaoqing
*/
public class Main {

/**
* @param args the command line arguments
*/
public static void main(String[] args) {

// TODO code application logic here
Scanner cin=new Scanner(System.in);
String str;
int inbas,oubas;
while(cin.hasNext())
{
str=cin.next();
inbas=cin.nextInt();
oubas=cin.nextInt();
BigInteger tmp=new BigInteger(str,inbas);

str=tmp.toString(oubas);
int len=str.length();
if(len>7)System.out.println("  ERROR");
else
{
str=str.toUpperCase(Locale.FRENCH);
for(int i=0;i< 7-len;i++)System.out.print(" ");
System.out.println(str);
}
}
}

}

1. 当你将要对一个女子恶意执法的时候，甚至企图进行人身侵犯的时候，你要想到你的母亲，她也是一个女人，你就是你母亲生出来的；你要想到你的姐姐，或者你的妹妹，或者你的女儿，她们，也都是女人。一个男人，要是对一个女子下恶手、

2. 代码是给出了，但是解析的也太不清晰了吧！如 13 abejkcfghid jkebfghicda
第一步拆分为 三部分 (bejk, cfghi, d) * C(13,3)，为什么要这样拆分，原则是什么？

3. 5.1处，反了；“上一个操作符的优先级比操作符ch的优先级大，或栈是空的就入栈。”如代码所述，应为“上一个操作符的优先级比操作符ch的优先级小，或栈是空的就入栈。”