JAVA 大数运算

使用C/C++处理大数据时有时不是很方便，这时可以使用JAVA中大数类，当然代价就是运行时慢。

 

import java.math.*;
import java.util.*;
import java.io.*;
import java.text.*;
public class test{
    public static void main(String args[]){
        Scanner in = new Scanner(System.in);
        BigInteger a, b;
        int t;
        t = in.nextInt();
        for(int i = 1;i <= t;i ++){
            a = in.nextBigInteger();
            b = in.nextBigInteger();
            System.out.println(a +" + " + b + " = " + a.add(b));
            System.out.println(a + " * " + b + " = " + a.multiply(b));
            System.out.println(a + " - " + b + " = " + a.subtract(b));
            System.out.println(a + " / " + b + " = " + a.divide(b));
        }
    }
}