实验：两个数的乘积、10位内自幂数判断

1.b????????两个数的乘积 ( The product of two numbers )

import java.util.Scanner;
class A{
    void times(int a,int b){
        System.out.println(a*b);
    }
    void times(double a,double b){
        System.out.printf("%.4f\n",a*b);
    }
}
public class Main {
    public static void main(String args[]){
        Scanner input=new Scanner(System.in);
        A a;
        a=new A();
        a.times(input.nextInt(),input.nextInt());
        a.times(input.nextDouble(),input.nextDouble());
    }
}

1.c? ? ? ? 10位内自幂数判断

import java.util.Scanner;

public class Main {
    public static void main(String args[]){
        Scanner input=new Scanner(System.in);
        int num=input.nextInt();
        int one[]=new int[10];
        int i=0;
        int p=num;
        while(p!=0){
            one[i++]=p%10;
            p=p/10;
        }
        int sum=0;
        for(int j=0;j<i;j++){
            int times=1;
            for(int k=0;k<i;k++){
                times=times*one[j];
            }
            sum=sum+times;
        }
        if(sum==num){
            System.out.println("Yes");
        }
        else{
            System.out.println("No");
        }

    }
}