SDKD《Java程序设计》 软件18-1,3 实验1

求最大值

考点

基本输入输出，分支语句(if-else)

代码

import java.io.*;
import java.util.*;
public class Main {
    public static void main(String[] args) {
        int a, b;
        Scanner cin = new Scanner(System.in);
        a = cin.nextInt();
        b = cin.nextInt();
        System.out.println(a >= b ? a : b);
    }
}

判断闰年

考点

基本输入输出，分支语句(if-else)

代码

import java.io.*;
import java.util.*;
public class Main {
    public static void main(String[] args) {
        int year;
        Scanner cin = new Scanner(System.in);
        year = cin.nextInt();
        boolean yes = false;
        if (year % 400 == 0)
            yes = true;
        else if (year % 4 == 0 && year % 100 != 0)
            yes = true;
        System.out.println(yes ? "yes" : "no");
    }
}

水仙花数

考点

基本输入输出，分支语句(if-else),循环语句

代码

打表法

import java.io.*;
import java.util.*;
public class Main {
    static final Scanner cin = new Scanner(System.in);
    public static void main(String[] args) {
        int[][] ans = new int[5][];
        ans[0] = new int[] { 153, 370, 371, 407 };
        ans[1] = new int[] { 1634, 8208, 9474 };
        ans[2] = new int[] { 54748, 92727, 93084 };
        ans[3] = new int[] { 548834 };
        ans[4] = new int[] { 1741725, 4210818, 9800817, 9926315 };
        int n = cin.nextInt() - 3;
        for (int i = 0; i < ans[n].length; i++) {
            System.out.println(ans[n][i]);
        }
    }
}

循环法

import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner cin = new Scanner(System.in);
        long N = cin.nextLong();
        long _start = 1;
        for (long i = 0; i < N - 1; i++)
            _start *= 10;
        long _end = _start * 10 - 1;
        for (long i = _start; i <= _end; i++) {
            long tmp = 0, cur = i;
            while (true) {
                if (cur == 0)
                    break;
                long m = cur % 10, ans = 1;
                for (int j = 0; j < N; j++)
                    ans *= m;
                tmp += ans;
                cur /= 10;
            }
            if (tmp == i)
                System.out.println(tmp);
        }
    }
}

基本输入

考点

基本输入输出

代码

import java.io.*;
import java.util.*;
public class Main {
    public static void main(String[] args) {
        Scanner cin = new Scanner(System.in);
        while(cin.hasNext()) //还有下一个输入
        {
            int a = cin.nextInt();
            int b = cin.nextInt();
            System.out.println(a+b);
        }
    }
}