C++Primer Plus习题记录-Chapter10

10-1

#pragma once
#include <string>
#ifndef ACCOUNT_H_
#define ACCOUNT_H_
class Account {
private:
    char names[20];
    char accounts[20];
    double deposits;
public:
    Account(char namec[],char accountc[],double depositc);
    ~Account();
    void display();
    void store(double n);
    void getout(double n);
};
#endif // !ACCOUNT_H_

#include "pch.h"
#include "account.h"
#include <iostream>
#include <cstring>
using namespace std;
Account::Account(char namec[],char accountc[],double depositc) {
    strcpy_s(names, namec);
    strcpy_s(accounts, accountc);
    deposits = depositc;
}
Account::~Account() {
}
void Account::display() {
    cout << names << ": " << accounts << "---" << deposits << endl;
}
void Account::store(double n) {
    deposits += n;
}
void Account::getout(double n) {
    deposits -= n;
}

#include "pch.h"
#include <iostream>
#include "account.h"
using namespace std;

int main(void) {
    char namec[20];
    char accountc[20];
    double depositc;
    cin >> namec;
    cin >> accountc;
    cin >> depositc;
    Account lls(namec, accountc,depositc);
    lls.display();
    lls.store(100.0);
    lls.display();
    lls.getout(20.0);
    lls.display();
    return 0;
}

10-2

#pragma once
#ifndef Person_H_
#define Person_H_
using namespace std;
class Person {
private:
    static const int LIMIT = 25;
    string lname;
    char fname[LIMIT];
public:
    Person() { lname = ""; fname[0] = '\0'; }
    Person(const string &ln, const char *fn = "Heyyou");
    void Show() const;
    void FormalShow() const;
};
#endif // !1

#include "pch.h"
#include <iostream>
#include <string>
#include "account.h"
Person::Person(const string &ln, const char *fn) {
    lname = ln;
    strcpy_s(fname,fn);
}
void Person::Show() const {
    cout << fname << " " << lname << endl;
}
void Person::FormalShow() const {
    cout << lname << " " << fname << endl;
}

#include "pch.h"
#include <iostream>
#include <cstdlib>
#include <string>
#include <cstring>
#include <ctime>
#include <array>
#include <iomanip>
#include <algorithm>
#include "account.h"
using namespace std;

int main(void) {
    Person one;
    Person two("Smythecraft");
    Person three("Dimwiddy", "Sam");
    one.Show();
    two.FormalShow();
    three.Show();

    return 0;
}

10-6

#pragma once
#ifndef Person_H_
#define Person_H_
using namespace std;
class Move {
private:
    double x;
    double y;
public:
    Move(double a = 0, double b = 0);
    void showmove() const;
    Move add(const Move & m) const;
    void reset(double a = 0, double b = 0);
};
#endif

#include "pch.h"
#include <iostream>
#include <string>
#include "account.h"
using namespace std;
Move::Move(double a, double b) {
    x = a;
    y = b;
}
void Move::showmove() const{
    cout << "Move toward x: " << x << "\nMove toward y: " << y << endl;
}
Move Move::add(const Move & m) const {
    Move newm;
    newm.x = x + m.x;
    newm.y = y + m.y;
    return newm;
}
void Move::reset(double a, double b) {
    x = a;
    y = b;
}


#include "pch.h"
#include <iostream>
#include "account.h"
using namespace std;

int main(void) {
    Move move1(1.1, 2.2);
    move1.showmove();
    Move move2(3.3, 4.4);
    move2.showmove();
    move2 = move2.add(move1);
    move2.showmove();
    move2.reset(0.1, 0.2);
    move2.showmove();

    return 0;
}

10-7

#pragma once
#ifndef Plorg_H_
#define Plorg_H_
using namespace std;
class Plorg {
private:
    enum {LEN=20};
    char names[LEN];
    int CI;
public:
    Plorg(const char* name="Plorga", int CI = 50);
    void setCI(int n);
    void show() const;
};
#endif

#include "pch.h"
#include <iostream>
#include <string>
#include "account.h"
using namespace std;
Plorg::Plorg(const char* name, int CI) {
    strcpy_s(names, name);
    this->CI = CI;
}
void Plorg::setCI(int n) {
    CI = n;
}
void Plorg::show() const {
    cout << names << ": " << CI << endl;
}

int main(void) {
    Plorg lls1;
    lls1.show();
    Plorg aa("lls", 20);
    aa.show();
    aa.setCI(30);
    aa.show();

    return 0;
}

10-8

#pragma once
class List {
public:
    typedef int Item;
private:
    enum {LIMIT=5};
    Item items[LIMIT];
    Item top;
public:
    List(const Item[]=nullptr, int m = 0) { top = 0; }
    bool push(const Item &);
    bool isempty()const;
    bool isfull()const;
    void visit(void(*fun)(Item &m));
};
void show(List::Item &m);
void change(List::Item &m);
List::Item getin();

#include "pch.h"
#include "list.h"
#include <iostream>
using namespace std;
bool List::push(const Item &m) {
    if (!isfull()) {
        items[top++] = m;
        return true;
    }
    else {
        cout << "插入失败。" << endl;
        return false;
    }
}
bool List::isempty()const {
    if (!top) return true;
    else return false;
}
bool List::isfull()const {
    if (top == LIMIT) return true;
    else return false;
}
void List::visit(void(*fun)(Item &m)) {
    for (int i = 0; i < top; i++)
        fun(items[i]);    
}
void show(List::Item &m) {
    cout << m << ", ";
}
void change(List::Item &m) {
    cout << "请输入要替换的内容：";
    List::Item a;
    cin >> a;
    m = a;
    cout << "替换成功，新的值为" << m << endl;
}
List::Item getin() {
    List::Item a;
    cout << "请输入你要插入的内容: ";
    cin >> a;
    while (!cin)
    {
        cin.clear();
        cout << "输入错误，请重新输入: ";
        cin >> a;
    }
    return a;
}

using namespace std;

int main(void) {
    List m;
    if (m.isempty())
        cout << "是空的！" << endl;
    else
        cout << "不是空的" << endl;
    while (!m.isfull())
    {
        List::Item a = getin();
        if (m.push(a))
            cout << "插入成功" << endl;
        else
            cout << "插入失败" << endl;
    }
    m.visit(show);
    m.visit(change);
    m.visit(show);
    system("pause");
    return 0;
}