java使用BigInteger和While
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java using BigInteger and While
提问by user503409
I have a problem
我有个问题
import java.math.BigInteger;
import java.io.*;
import java.util.*;
import java.lang.*;
public class medici {
public static void main(String[] arg) {
{
BigInteger zac = new BigInteger("3");
zac = zac.pow(399);
BigInteger kon = new BigInteger("3");
kon = kon.pow(400);
BigInteger nul = new BigInteger("0");
BigInteger jed = new BigInteger("1");
BigInteger detel = new BigInteger("3");
for (BigInteger a = zac; a.compareTo( kon ) <= 0; a = a.add(jed)) {
cis = a ; // THIS A PROBLEM
String retez = "";
while ( cis > 0 ); // THIS IS A PROBLEM
retez = ( cis.mod(detel) ) + retez;
cis = cis.divide(detel);
System.out.println(retez);
}
}
}
}
I've tried this formula BigInteger cis = new BigInteger("a");for this cis = a ;
我试过这个公式BigInteger cis = new BigInteger("a");此cis = a ;
and while ( cis.compareTo( nul ) > 0 );for this while ( cis > 0 );
与while ( cis.compareTo( nul ) > 0 );此while ( cis > 0 );
but it doesn't work and I don't know why.
但它不起作用，我不知道为什么。
When I use this formula, this is the same, but I used only integer when I use the same for Big Integer it doesn't work
当我使用这个公式时，这是相同的，但是当我将相同的用于 Big Integer 时，我只使用了 integer 它不起作用
import java.io.*;
import java.util.*;
import java.lang.*;
public class netik {
public static void main(String[] arg) {
{
int a ;
int cis;
int detel = 3;
for ( a = 567880; a <= 567890; a++ ){
cis = a;
String retez = "";
while (cis > 0) {
retez = (cis % detel) + retez;
cis /= detel;
}
System.out.println(retez);
}
}
}
}
采纳答案by jjnguy
To declare cisand store ainto cissee the following:
要声明cis并存储a到cis以下内容中：
BigInteger cis = new BigInteger(""+a);
Assuming this code is the main cause of your problems, and assuming cisis a BigInteger:
假设此代码是您问题的主要原因，并且假设cis是BigInteger：
while (cis > 0) {
retez = (cis % detel) + retez;
cis /= detel;
}
This should instead be: (This assumes everything is a BigInteger.
这应该是：（这假设一切都是BigInteger.
while (cis.compareTo(new BigInteger("0")) > 0) {
retez = (cis.mod(detel)).add(retez);
cis = cis.divide(detel);
}
The following code runs for me:
以下代码为我运行：
public static void main(String[] arg) {
BigInteger zac = new BigInteger("3");
zac = zac.pow(399);
BigInteger kon = new BigInteger("3");
kon = kon.pow(400);
BigInteger nul = new BigInteger("0");
BigInteger jed = new BigInteger("1");
BigInteger detel = new BigInteger("3");
for (BigInteger a = zac; a.compareTo(kon) <= 0; a = a.add(jed)) {
BigInteger cis = a; // THIS A PROBLEM
String retez = "";
while (cis.compareTo(new BigInteger("0")) >= 0) {
retez = (cis.mod(detel)) + retez;
cis = cis.divide(detel);
System.out.println(retez);
}
}
}
It doesn't produce the neatest results. But it runs.
它不会产生最整洁的结果。但它运行。
回答by Neil
Wow, that's hard to read.
From what I've gathered, cis isn't declared. I assume you meant to have BigInteger cis; up there somewhere. Please be more specific. What type of problem are you receiving? Compilation error? Problem in what the program actually does?
哇，这很难读。
根据我收集的信息，未声明 cis 。我假设你的意思是 BigInteger cis; 那里的某个地方。请更具体。您遇到什么类型的问题？编译错误？程序实际做什么的问题？
