如何仅显示输出的特定数字?我如何从biginteger删除0?
我的示例:
有一个任务以显示数字的阶乘的最后一个数字,而不是0。
Example:
1! = 1
2! = 2
3! = 6
4! = 4
5! = 2
6! = 2
现在它只是显示阶乘。
import java.math.BigInteger;
import java.util.Scanner;
public class Main{
// Returns Factorial of N
static BigInteger factorial(int N){
// Initialize result
BigInteger f = new BigInteger("1"); // Or BigInteger.ONE
// Multiply f with 2, 3, ...N
for (int i = 2; i <= N; i++)
f = f.multiply(BigInteger.valueOf(i));
return f;
}
// Driver method
public static void main(String args[]) throws Exception
{
Scanner scan = new Scanner(System.in);
int n = scan.nextInt();
System.out.println(factorial(n));
}
}
示例vol2->在这里我需要一个解决方案才能从biginteger删除0:
import java.math.BigInteger;
import java.util.Scanner;
public class Main{
// Returns Factorial of N
static BigInteger factorial(int N){
// Initialize result
BigInteger f = new BigInteger("1"); // Or BigInteger.ONE
// Multiply f with 2, 3, ...N
for (int i = 2; i <= N; i++)
f = f.multiply(BigInteger.valueOf(i));
return f;
}
// Driver method
public static void main(String args[]) throws Exception
{
Scanner scan = new Scanner(System.in);
int n = scan.nextInt();
BigInteger a = (factorial(n));
BigInteger b, c;
c = new BigInteger("10");
b = a.mod(c);
System.out.println(b);
System.out.println(a);
}
}
是否有一种简单的方法可以从数字中删除所有0?那将是解决我的问题的最简单方法
您可以将您的号码转换为字符串并删除零。然后,您将其放回BigInteger
:
public static BigInteger removeZeroes(int i) {
return new BigInteger(String.valueOf(i).replace("0", ""));
}