UVa 579 Clock Hands
水题。。
求任意时刻时针和分针的夹角,其结果在0°到180°之间。
这里又一次用到了sscanf()函数,确实很方便。
思路:我们分别求出时针和分针转过的角度,然后大的减小的,如果结果ans大于180,那么ans = 360 - ans。
ClockHands |
The medieval interest in mechanical contrivances is well illustrated by the development of the mechanical clock, the oldest of which is driven by weights and controlled by a verge, an oscillating arm engaging with a gear wheel. It dates back to 1386.
Clocks driven by springs had appeared by the mid-15th century, making it possible to con- struct more compact mechanisms and preparing the way for the portable clock.
English spring-driven pendulum clocks were first commonly kept on a small wall bracket and later on a shelf. Many bracket clocks contained a drawer to hold the winding key. The earliest bracket clocks, made for a period after 1660, were of architectural design, with pillars at the sides and a pediment on top.
In 17th- and 18th-century France, the table clock became an object of monumental design, the best examples of which are minor works of sculpture.
The longcase clocks (also called grandfather clocks) are tall pendulum clock enclosed in a wooden case that stands upon the floor and is typically from 6 to 7.5 feet (1.8 to 2.3 m) in height. Later, the name ``grandfather clock'' became popular after the popular song "My Grandfather's Clock," written in 1876 by Henry Clay Work.
One of the first atomic clocks was an ammonia-controlled clock. It was built in 1949 at the National Bureau of Standards, Washington, D.C.; in this clock the frequency did not vary by more than one part in 108
Nuclear clocks are built using two clocks. The aggregate of atoms that emit the gamma radiation of precise frequency may be called the emitter clock; the group of atoms that absorb this radiation is the absorber clock. One pair of these nuclear clocks can detect energy changes of one part in 1014 , being about 1,000 times more sensitive than the best atomic clock.
The cesium clock is the most accurate type of clock yet developed. This device makes use of transitions between the spin states of the cesium nucleus and produces a frequency which is so regular that it has been adopted for establishing the time standard.
The history of clocks is fascinating, but unrelated to this problem. In this problem, you are asked to find the angle between the minute hand and the hour hand on a regular analog clock. Assume that the second hand, if there were one, would be pointing straight up at the 12. Give all angles as the smallest positive angles. For example 9:00 is 90 degrees; not -90 or 270 degrees.
Input
The input is a list of times in the form H:M, each on their own line, with and
. The input is terminated with the time 0:00. Note that H may be represented with 1 or 2 digits (for 1-9 or 10-12, respectively); M is always represented with 2 digits (The input times are what you typically see on a digital clock).
Output
The output displays the smallest positive angle in degrees between the hands for each time. The answer should between 0 degrees and 180 degrees for all input times. Display each angle on a line by itself in the same order as the input. The output should be rounded to the nearest 1/1000, i.e., three places after the decimal point should be printed.
Sample Input
12:00
9:00
8:10
0:00
Sample Output
0.000
90.000
175.000
Miguel A. Revilla
1998-03-10
AC代码:
//#define LOCAL
#include <iostream>
#include <cstdio>
#include <cstring>
#include <algorithm>
using namespace std; int main(void)
{
#ifdef LOCAL
freopen("579in.txt", "r", stdin);
#endif int h, m;
char c[];
while(gets(c))
{
sscanf(c, "%d:%d", &h, &m);
if(h == && m == )
break;
if(h == )//12点不方便处理,转化为0点
h = ;
double angle1, angle2, ans;
angle1 = h * + (double) m / ;
angle2 = m * ;
ans = max(angle1, angle2) - min(angle1, angle2);
if(ans > )
ans = - ans;
printf("%.3lf\n", ans);
}
return ;
}
代码君
UVa 579 Clock Hands的更多相关文章
- UVa 170 - Clock Patience
题目:Clock Patience游戏,将52张扑克牌,按时钟依次分成13组(中心一组),每组4张全都背面向上, 从中间组最上面一张牌開始.翻过来设为当前值,然后取当前值相应组中最上面的背过去的牌翻过 ...
- uva 579 ClockHands 几何初接触 求时针与分针的夹角
貌似是第一次接触几何题... 求时针与分针的夹角,这不是小学生的奥数题么.我小时候也想过这问题的. 每过一小时时针走1/12*360=30度,每过一分钟时针走1/60*30=0.5度,分针走1/60* ...
- UVa 10012 - How Big Is It? 堆球问题 全排列+坐标模拟 数据
题意:给出几个圆的半径,贴着底下排放在一个长方形里面,求出如何摆放能使长方形底下长度最短. 由于球的个数不会超过8, 所以用全排列一个一个计算底下的长度,然后记录最短就行了. 全排列用next_per ...
- POJ 1087 A Plug for UNIX / HDU 1526 A Plug for UNIX / ZOJ 1157 A Plug for UNIX / UVA 753 A Plug for UNIX / UVAlive 5418 A Plug for UNIX / SCU 1671 A Plug for UNIX (网络流)
POJ 1087 A Plug for UNIX / HDU 1526 A Plug for UNIX / ZOJ 1157 A Plug for UNIX / UVA 753 A Plug for ...
- 修改Linux系统日期与时间date clock
先设置日期 date -s 20080103 再设置时间 date -s 18:24:30 为了永久生效,需要将修改的时间写入CMOS. 查看CMOS的时间: #clock -r 将当前系统时间写到C ...
- 操作系统页面置换算法(opt,lru,fifo,clock)实现
选择调出页面的算法就称为页面置换算法.好的页面置换算法应有较低的页面更换频率,也就是说,应将以后不会再访问或者以后较长时间内不会再访问的页面先调出. 常见的置换算法有以下四种(以下来自操作系统课本). ...
- Cesium应用篇:3控件(1)Clock
创建 跟Clock相关的主要有Animation控件和Timeline控件,通常两者会放在一起使用. 在Cesium中,Viewer默认开启这两个控件,如果你想要不显示控件,可以在Viewer初始化中 ...
- uva 1354 Mobile Computing ——yhx
aaarticlea/png;base64,iVBORw0KGgoAAAANSUhEUgAABGcAAANuCAYAAAC7f2QuAAAgAElEQVR4nOy9XUhjWbo3vu72RRgkF5
- UVA 10564 Paths through the Hourglass[DP 打印]
UVA - 10564 Paths through the Hourglass 题意: 要求从第一层走到最下面一层,只能往左下或右下走 问有多少条路径之和刚好等于S? 如果有的话,输出字典序最小的路径 ...
随机推荐
- arcgis python 保存当前窗口图形为jpg
1,第一步打开arcgis 将图形加载进去 第二步,将要保存的图形调到合适的比例尺,然后点击下面按钮 第三步,将写好的python 语句放到里面去: import arcpy mxd = arcpy. ...
- cordova开发的坑
相机 根据android版本,有各种问题. 1.拍照后不会自动清内存造成内存溢出,导致照片不会自动旋转,拍多张之后会自动刷新网页. 2.小米手机安卓7.0时,拍出的照片不会自动旋转,需要安卓端代码调整 ...
- Redis集群批量操作
Redis在3.0版正式引入了集群这个特性,扩展变得非常简单.然而当你开心的升级到3.0后,却发现有些很好用的功能现在工作不了了, 比如我们今天要聊的pipeline功能等批量操作. Redis集群是 ...
- 22/tcp open|filtered ssh 80/tcp open|filtered http
22/tcp open|filtered ssh80/tcp open|filtered http nmap不能确定该端口是打开还是过滤,这可能是扫描一个打开的端口,但没有回应.
- [Java]获取byte数组的实际使用长度
背景:byte.length只能获取到初始化的byte数组长度,而不是实际使用的长度,因此想要获取到实际的使用长度只能靠其他方法实现. 方法一: public class ByteActualLeng ...
- ADO.Net——防止SQL注入攻击
规避SQL注入 如果不规避,在黑窗口里面输入内容时利用拼接语句可以对数据进行攻击 如:输入Code值 p001' union select * from Info where '1'='1 //这样可 ...
- js字符串、数组、时间、日期对象
js对字符串.数组.日期的操作是在以后项目中频繁使用的操作,所以呢....所以大家看着办,其实并不难哈,就是有点无聊,我承认这是我百度的,哈哈哈哈 <!DOCTYPE html><h ...
- UIView Border color
// // UIView+Borders.h // // Created by Aaron Ng on 12/28/13. // Copyright (c) 2013 Delve. All right ...
- 剑指offer55 字符流中第一个不重复的字符(最典型错误)
典型并且基础的错误: class Solution { public: //Insert one char from stringstream void Insert(char ch) { ) res ...
- 面向对象OONo.3单元总结
一,JML语言 1)JML理论基础:JML是一类语言,用来描述一个方法或一个类的功能.以及这个类在实现这个功能时需要的条件.可能改变的全局变量.以及由于条件问题不能实现功能时这个方法或类的行为,具有明 ...