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参数估计 最小二乘法 与 曲线拟合 最小二乘法 有什么区别
参数估计 最小二乘法 与 曲线拟合 最小二乘法 有什么区别 这里先 标记 参数估计 最大似然估计 数学原理。。。。
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‎C2U.cpp

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//
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// C2U.cpp
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// CPPB20180806
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//
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// Created by admindyn on 2018/8/16.
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// Copyright © 2018年 admindyn. All rights reserved.
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//
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#include "C2U.hpp"
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//
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// CU.cpp
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// CPPB20180806
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//
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// Created by admindyn on 2018/8/7.
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// Copyright © 2018年 admindyn. All rights reserved.
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//
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#include <new>
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#include "illegalParameterValue.hpp"
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C2U::C2U(signType theSign,unsigned long theDollars,unsigned int theCents)
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{
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//创建一个Currency 类对象
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setValue(theSign, theDollars, theCents);
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}
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void C2U::setValue(signType theSign, unsigned long theDollars, unsigned int theCents)
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{
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//给调用对象的数据成员赋值
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if (theCents>99) {
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throw illegalParameterValue("Cents should be < 100");
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}
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amount = theDollars*100+theCents;
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if (theSign==minusv) {
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amount=-amount;
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}
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}
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void C2U::setValue(double theAmount)
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{
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//给调用对象的数据成员赋值
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//提取整数部分
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/*
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数据类型 向下转型
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大内存空间 double 到 unsigned long
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float 到 int
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数组指针 首地址 可以 转为首元素指针 首元素地址
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子类 向父类转型
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*/
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if (theAmount<0) {
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amount=(long)((theAmount-0.001)*100);
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}else
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{
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amount=(long)((theAmount-0.001)*100);
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}
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}
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signType C2U::getSign()const
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{
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if (amount<0) {
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return minusv;
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}else{
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return plusv;
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}
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}
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unsigned long C2U::getDollars()const
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{
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if (amount<0) {
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return (-amount)/100;
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}else
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{
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return amount/100;
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}
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}
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unsigned int C2U::getCents()const
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{
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if (amount<0) {
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return -amount-getDollars()*100;
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}else
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{
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return amount-getDollars()*100;
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}
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}
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/*
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操作符重载
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*/
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C2U C2U::operator+(const C2U &x) const
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{
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/*把参数对象x和调用对象*this相加*/
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C2U result;
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result.amount = amount + x.amount;
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return result;
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}
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C2U& C2U::operator+=(const C2U &x)
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{
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amount =amount + x.amount;
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return *this;
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}
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/*这里对流插入操作符 也是重载 但是没有作为成员函数重载而已 但是即便修改也是作为 友元函数重载*/
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ostream& operator<<(ostream&out,const C2U&x)
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{
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x.output(out);
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return out;
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}
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/**/
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void C2U::output(ostream&out)const
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{
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long theAmount = amount;
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if (theAmount<0) {
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out<<"-";
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theAmount = - theAmount;
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}
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long dollars = theAmount/100;//美元
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out<<"$"<<dollars<<".";
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int cents = theAmount-dollars*100;//美分
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if (cents<10) {
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out<<"0";
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}
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out<<cents;
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}
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C2U::~C2U()
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{
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}
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‎C2U.hpp

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//
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// C2U.hpp
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// CPPB20180806
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//
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// Created by admindyn on 2018/8/16.
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// Copyright © 2018年 admindyn. All rights reserved.
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//
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#ifndef C2U_hpp
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#define C2U_hpp
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#include "ENUMTYPE.hpp"
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#include <iostream>
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#include <stdio.h>
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using namespace std;
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/*
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对现有类实现操作符重载
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实现+ +=操作符重载 并定义为成员函数
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实现<<流插入操作符 但未定义为成员函数
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但是添加成员函数output 成员函数 辅助对<<流插入操作符的使用
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因为 非成员函数不能访问类实例对象的私有成员
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*/
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class C2U {
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public:
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//构造函数
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C2U(signType theSign = plusv,unsigned long theDollars = 0,unsigned int theCents=0);
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//析构函数
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~C2U();
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void setValue(signType,unsigned long,unsigned int);
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void setValue(double);
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signType getSign() const;
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unsigned long getDollars() const;
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unsigned int getCents() const;
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C2U operator+(const C2U&) const;
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C2U& operator+=(const C2U&);
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void output(ostream&) const;
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private:
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long amount;
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};
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#endif /* C2U_hpp */

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