Question

我只想问你是怎么决定的

Enter a number: 14
Then the date to day is Sunday.

上面的演示是1-7 =星期一 - 星期日然后如果值是8那么它的星期一再次......但我怎么能确定呢？使用循环和模数？...

感谢任何帮助我的评论...

任何语言都可以，我只想知道算法...

Answer 1

您可以使用模块

模块达到0所以它会像

<?php
    $value = 13;
    $daynames = array("mon", "tues", "wed", "thur", "fri", "sat", "sun");

    // The + 1 is because % is 0, and you want 1-7
    echo (($value % 7) + 1) .  "day of the week";
    echo "the day is " . $daynames[($value % 7)];
?>

示例：http://codepad.org/wbGuMI06

Answer 2

如果您有七天的开关/案例或if / else，您可以使用modulo 7将输入输入到所需的7天范围内。

Answer 3

您可以使用switch语句和模运算来执行此操作。

学习计算机科学的第一步是要知道数字通常不是从1开始。从0开始。这个想法将在未来对你有很大的帮助！

// accept numbers 0-6. If 7 were to get put in, it would end up being 0 since 7 % 7 = 0.

switch(num % 7) {
case 0: return "Sunday";
case 1: return "Monday";
case 2: return "Tuesday";
/// rest here...
default: throw new IllegalArgumentException();

}

Answer 4

以模7为数似乎是显而易见的。

Answer 5

string day;
int inputNumber;

if(inputNumber%7 == 0)
  day = "monday";  // or sunday if you prefer :p
else if(inputNumber%7 == 1)
  day = tuesday
...
...
...

Answer 6

在C ++中，int day = (i-1) % 7;将为您提供从零开始的偏移量。这是示例代码：

#include <iostream>
#include<string>

using namespace std;

int main()
{
    static const std::string days [] = 
    {
        "Sunday",
        "Monday",
        "Tuesday",
        "Wednesday",
        "Thursday",
        "Friday",
        "Saturday"
    };

    static const size_t num_days = sizeof(days)/sizeof(days[0]);

    for( int i = 1; i <= 31; ++i )
    {
        int day = (i-1) % 7;
        cout << day << " = " << days[day] << "\n";
    }
}

Answer 7

获取传入的int值的模7并为其创建switch语句。

switch:
   case 1:
    Sunday
   case 2:
    Monday 

    // and so on

Answer 8

datArr= new Array ('Sun', 'Mon', 'Tue',Wen', 'Thu, 'Fri', 'Sat');
day =datArr[(daynum%7)];

如果将星期日视为零日，则无需在模数之后减去1。当然，如果遇到零的实际值，大多数解决方案都将失败，零潜水。

Answer 9

import java.util.Scanner;

public class TestMain {
    private static final String[] DAYS = new String[] { "Sunday", "Monday", "Tuesday", "Wednesday", "Thusday", "Friday", "Saturday" };

    public static void main(final String[] args) {
        System.out.print("Enter a number: ");

        final Scanner scanner = new Scanner(System.in);
        final int n = scanner.nextInt();

        System.out.print("Then the date to day is " + DAYS[n % 7]);
    }
}

根据数量确定日期

9 个答案: