（水）hdu1212,1753用来练习java大数

1212

import java.math.*;
import java.util.*;
public class Main {

 /**
  * @param args
  */
 public static void main(String[] args) {
  // TODO Auto-generated method stub
  BigInteger a,b;
  Scanner cin = new Scanner(System.in);
  
  while(cin.hasNext()){
   a = cin.nextBigInteger();
   b = cin.nextBigInteger();
            BigInteger result[]=a.divideAndRemainder(b);//求出余数的除法操作
   System.out.println(result[1]);
  }
 }

}

 

 1753

import java.math.*;
import java.util.*;
public class Main {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		BigDecimal a,b;
		Scanner cin = new Scanner(System.in);
		
		while(cin.hasNext()){
			a = cin.nextBigDecimal();
			b = cin.nextBigDecimal();
			BigDecimal c=a.add(b);
			System.out.println(c.stripTrailingZeros().toPlainString());
		}
	}
}