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进入策略模式学习啦。先实现一个笨办法的商场打折收银...
14 totalPrices=Convert.ToDouble(txtPrice.Text)*Convert.ToDouble(txtNum.Text);15 break;16 case 1: 17 totalPrices=Convert.ToDouble(txtPrice.Text)*Convert.ToDouble(txtNum.Text)*0.8;18 break;19 case 2: 20...文章 2013-04-20 954浏览量 -
Swift-EasingAnimation
class func LinearInterpolation(p:Double)->Double { return p } MARK:Quadratic easing;p^2 class func QuadraticEaseIn(p:Double)->Double { return p*p } class func QuadraticEaseOut(p:Double)->...文章 2016-04-14 1156浏览量 -
C#（四十九）之Convert类 和 Parse方法的区别
Convert类常用的类型转换方法方法说明Convert.ToInt32()转换为整型(int)Convert.ToChar()转换为字符型(char)Convert.ToString()转换为字符串型(string)Convert.ToDateTime()转换为日期型(datetime)Convert.ToDouble...文章 2022-04-26 51浏览量 -
使用贝塞尔曲线进行插值 一种非常简单的平滑多边形的...
right to change the coefficient of smoothing(K).Value K=1 is about 100 pixels from the left border of the window.Each left double-click generates a random polygon.You can also rotate and scale it,and ...文章 2018-07-11 1484浏览量 -
2005 TCO Online Round 1-RectangleError
Method signature:double bottomRange(double topMin,double topMax,double leftMin,double leftMax,double rightMin,double rightMax) (be sure your method is public) Notes Your return value must have an ...文章 2016-05-21 636浏览量 -
WGS84，GCJ02，BD09坐标转换
84 81*@param bd_lat 82*@param bd_lon 83*@return 84*/85 public static Gps bd09_To_Gps84(double bd_lat,double bd_lon){ 86 87 Gps gcj02=PositionUtil.bd09_To_Gcj02(bd_lat,bd_lon);88 Gps map84=PositionUtil...文章 2017-11-26 3058浏览量 -
Percona Server 5.7 并行doublewrite 特性
After implementing parallel LRU flushing as described in the previous post,we went back to benchmarking.At first,we tested with the doublewrite buffer turned off.We wanted to isolate the effect of the...文章 2017-10-17 2138浏览量 -
【MySQL】double write 浅析
If there’s a partial page write to the doublewrite buffer itself,the original page will still be on disk in its real location.-如果是写doublewrite buffer本身失败,那么这些数据不会被写到磁盘,InnoDB此时...文章 2016-04-13 2732浏览量 -
C#委托基础1——委托基础
double y=Convert.ToDouble(Console.ReadLine());Console.WriteLine("结果{0}",mm(x,y));Console.ReadLine();} static void Main(string[]args) { MathMethod mm;Program p=new Program();mm=p.Divide;p.DoCalculate...文章 2012-11-26 847浏览量 -
【MySQL】double write 浅析
If there’s a partial page write to the doublewrite buffer itself,the original page will still be on disk in its real location.-如果是写doublewrite buffer本身失败,那么这些数据不会被写到磁盘,InnoDB此时...文章 2014-04-12 879浏览量 -
Java中高精度问题的bigdecimal解决方式
public static double div(double v1,double v2,int scale) public static double round(double v,int scale) 附录 源文件Arith.java： package com.common.util;import java.math.BigDecimal;public final class ...文章 2015-04-13 1849浏览量 -
mysql之 double write 浅析
When InnoDB recovers,it will use the original page instead of the corrupted copy in the doublewrite buffer.However,if the doublewrite buffer succeeds and the write to the page’s real location fails,...文章 2017-11-12 1918浏览量 -
C#学习笔记(4)
double d1=Convert.ToDouble(textBox1.Text.Trim());C.calculate(d1);} } else if(textBox2.Text.Trim()!amp;amp;textBox3.Text.Trim()!{ double d2=Convert.ToDouble(textBox2.Text.Trim());double d3=...文章 2014-02-28 1023浏览量 -
JAVA常用类之Math
toRadians(double angdeg) 将用角度表示的角转换为近似相等的用弧度表示的角 static double ulp(double d) 返回参数的 ulp 大小 static float ulp(float f) 返回参数的 ulp 大小 Math的使用比较简单，这里就不写例子...文章 2015-12-26 1164浏览量 -
.Net判断点在三角形内部的问题
double sourceArea=Convert.ToDouble(CalcArea.Util.triArea(t));t=new CalcArea.Triangle(p1,p2,p4);double area1=Convert.ToDouble(CalcArea.Util.triArea1(t));t=new CalcArea.Triangle(p3,p2,p4);double area2=...文章 2014-01-08 638浏览量 -
Math类
可以求余弦、正切、反正弦、反余弦和反正切public static double toRadians(double angdeg)角度换算成弧度public static double toDegrees(double angrad)弧度换算成角度public static double exp(double a)求e的a次...文章 2021-12-06 63浏览量 -
代码无错就是优？简单工厂模式 C#
case"+":strResult=Convert.ToDouble(strNumberA)+Convert.ToDouble(strNumberB);break;case"-":strResult=Convert.ToDouble(strNumberA)-Convert.ToDouble(strNumberB);break;case"*":strResult=Convert.ToDouble...文章 1970-01-01 1122浏览量 -
Swift 学习之二十：类型强转（+、－、＊、/）
brief In order to make different types can be operated, define the below functions. author huangyibiao make Int+Double=Double derectly infix func+(lhsParam:Int,rhsParam:Double)->Double { return ...文章 2014-06-11 1061浏览量 -
设计模式（二）之策略模式
Convert.ToDouble(textBox2.Text);switch(comboBox1.SelectedIndex) { case 0: total&61;price*number*0.8;break;case 1: total&61;price*number*0.6;break;case 2: total&61;price*number*0.4;break;default: total...文章 2022-04-24 44浏览量 -
double to str&str to double
const double DBF;char DoubleToStr(const double DBF,char szStr,int iNum){ memset(szStr,0x00,iNum);sprint(szStr,"%.2lf",DBF);szStr[iNum-1]=0;return szStr;} double strtodouble(const char*szStr){ return ...文章 2017-12-26 978浏览量 -
一个完整的C++程序SpreadSheet-1)类的声明和定义
double stringToDouble(const std:string&inString)const;double mValue;std:string mString;};2.SpreadsheetCell.cpp include"SpreadsheetCell.h include<iostream>include<sstream>using ...文章 2015-07-12 860浏览量 -
HDOJ 2056 Rectangles
Given two rectangles and the coordinates of two points on the diagonals of each rectangle,you have to calculate the area of the intersected part of two rectangles.its sides are parallel to OX and OY. ...文章 2016-01-28 848浏览量 -
C++函数如何返回两个或以上的返回值？
raster_to_series(double*pafScanline) { 这里是函数的代码部分 return make_pair(pixel_paf,miss_rate_paf);} 其中，在函数的返回值部分，我们需要基于make_pair()函数，将数据类型分别为double*与double*的两个...文章 2023-02-12 27浏览量 -
C#学习笔记(3)
double inNum=Convert.ToDouble(textBox1.Text.Trim());double inCost=Convert.ToDouble(textBox2.Text.Trim());double inSale=Convert.ToDouble(textBox3.Text.Trim());double nowNum=inNum-inSale;double ...文章 2014-02-28 891浏览量 -
【原创】开源Math.NET基础数学类库使用(07)常用的数学...
The number ln(10)/20-factor to convert from Power Decibel(dB)to Neper(Np).Use this version when the Decibel represent a power gain but the compared values are not powers(e.g.amplitude,current,voltage)...文章 2017-10-29 643浏览量 -
使用enum建立简单的状态机
The enum in Java is more powerful than many other languages which can lead to surprising uses. In this article,I outline some the individual features of enum in Java,and put them together to form a ...文章 2016-05-06 1488浏览量 -
设计模式之-简单工厂模式
D=Convert.ToString(Convert.ToDouble(A)+Convert.ToDouble(C));if(B="-") D=Convert.ToString(Convert.ToDouble(A)-Convert.ToDouble(C));if(B="*") D=Convert.ToString(Convert.ToDouble(A)*Convert.ToDouble(C));...文章 2017-07-18 710浏览量 -
色彩空间转换
void RGB2YUV(double R,double G,double B,double&Y,double&U,double&V) { Y=static_cast<double>(0.257*R+0.504*G+0.098*B+16);y U=static_cast<double>(-0.148*R-0.291*G+0.439*B+128);u ...文章 2018-01-07 912浏览量 -
C#封装四则运算示例
38 strResult=Convert.ToString(Operation.GetResult(Convert.ToDouble(strNumberA),Convert.ToDouble(strNumberB),strOperate));39 Console.WriteLine("Result is:"+strResult);40 Console.ReadLine();41 Console....文章 2013-04-20 860浏览量 -
百度地图API位置偏移的校准算法
public static Gps gcj02_To_Bd09(double gg_lat,double gg_lon){ double x=gg_lon,y=gg_lat;double z=Math.sqrt(x*x+y*y)+0.00002*Math.sin(y*pi);double theta=Math.atan2(y,x)+0.000003*Math.cos(x*pi);double bd...文章 2017-11-17 2883浏览量
