==============================================
/* 程式檔名:Test_C10-40-1.cpp */
/* 程式目的:請撰寫一個日曆類別，內有記錄年、月、日的資料成員，並多載++/--運算子，用以遞增即遞減日期*/
/* 程式設計:蘇彥儒*/
/* 完成日期:20150407 */
#include<iostream>
using namespace std;
class RecordDate{
public:
RecordDate(int,int,int);
void Dateshow()
{
cout << year << "年" << month << "月" << day << "日" << endl;
}
RecordDate& operator++();
RecordDate& operator--();
private:
int year,month,day;
static int monthdays[12];
};
int RecordDate::monthdays[12]={31,28,31,30,31,30,31,31,30,31,30,31};
RecordDate::RecordDate(int y=2014,int m=1,int d=1)
{
year=y;
month=(m>=1 && m<=12)?m:1;
day=(d>=1 && d<=monthdays[m-1])?d:1;
}
RecordDate& RecordDate::operator++()
{
if(++day > monthdays[month-1]){
day = 1;
if(++month == 13){
month=1;
year++;
}
}
return *this;
}
RecordDate& RecordDate::operator--()
{
if(--day ==0)
if(--month==0){
month=12;
year--;
}
day=monthdays[month-1];
return *this;
}
int main()
{
RecordDate c1(2014,12,31);
RecordDate c2(2015);
(++c1).Dateshow();
(--c2).Dateshow();
system("PAUSE");
return 0;
}
==============================================
/* 程式檔名:Test_C10-40-2.cpp */
/* 程式目的:請多載簡法運算子，將兩物件相減，可傳回兩個日期之間相差幾天*/
/* 程式設計:蘇彥儒*/
/* 完成日期:20150407 */
#include<iostream>
using namespace std;
class RecordDate{
public:
RecordDate(int,int,int);
void Dateshow()
{
cout << year << "年" << month << "月" << day << "日" << endl;
}
RecordDate& operator++();
RecordDate& operator--();
int operator-(RecordDate c);
private:
int year,month,day;
static int monthdays[12];
};
int RecordDate::monthdays[12]={31,28,31,30,31,30,31,31,30,31,30,31};
RecordDate::RecordDate(int y=2014,int m=1,int d=1)
{
year=y;
month=(m>=1 && m<=12)?m:1;
day=(d>=1 && d<=monthdays[m-1])?d:1;
}
RecordDate& RecordDate::operator++()
{
if(++day > monthdays[month-1]){
day = 1;
if(++month == 13){
month=1;
year++;
}
}
return *this;
}
RecordDate& RecordDate::operator--()
{
if(--day ==0)
if(--month==0){
month=12;
year--;
}
day=monthdays[month-1];
return *this;
}
int RecordDate::operator-(RecordDate c)
{
int days1 = 365 * year;
if(month > 1)
for(int i=1;i<month;i++)
days1 += monthdays[i-1];
days1 += day;
int days2 = 365 * c.year;
if(c.month > 1)
for(int i=1;i<c.month;i++)
days2 += monthdays[i-1];
days2 += c.day;
return (days1>days2)?(days1-days2):(days2-days1);
}
int main()
{
RecordDate c1(2014,12,31);
RecordDate c2(2015,12,31);
c1.Dateshow();
c2.Dateshow();
cout << "之間相差 " << c2 - c1 << " 天";
system("PAUSE");
return 0;
}
==============================================
/* 程式檔名:Test_C10-40-3.cpp */
/* 程式目的:試去除多載的減法運算子，改成設計可將類別物件轉型為int型別(例如西元1年1月1日代表1)的型別轉換運算子，在做減法運算*/
/* 程式設計:蘇彥儒*/
/* 完成日期:20150408 */
#include<iostream>
using namespace std;
class RecordDate{
public:
RecordDate(int,int,int);
void Dateshow()
{
cout << year << "年" << month << "月" << day << "日" << endl;
}
RecordDate& operator++();
RecordDate& operator--();
operator int();
private:
int year,month,day;
static int monthdays[12];
};
int RecordDate::monthdays[12]={31,28,31,30,31,30,31,31,30,31,30,31};
RecordDate::RecordDate(int y=2014,int m=1,int d=1)
{
year=y;
month=(m>=1 && m<=12)?m:1;
day=(d>=1 && d<=monthdays[m-1])?d:1;
}
RecordDate& RecordDate::operator++()
{
if(++day > monthdays[month-1]){
day = 1;
if(++month == 13){
month=1;
year++;
}
}
return *this;
}
RecordDate::operator int()
{
int days = 365 * year;
if(month > 1)
for(int i=1;i<month;i++)
days += monthdays[i-1];
days += day;
return days;
}
int main()
{
RecordDate c1(2014,12,31);
RecordDate c2(2015,12,31);
c1.Dateshow();
c2.Dateshow();
cout << "之間相差 " << c2 - c1 << " 天";
system("PAUSE");
return 0;
}
==============================================
/* 程式檔名:Test_C10-40-4.cpp */
/* 程式目的:請設計類別，其中可存放10個整數。請多載()運算子，可在括號中放入一整數參數，若物件中已有該參數，即傳回true，沒有則傳回false*/
/* 程式設計:蘇彥儒*/
/* 完成日期:20150408 */
#include<iostream>
using namespace std;
class Numbers {
public:
Numbers(int,int,int,int,int,int,int,int,int,int);
bool operator()(int);
private:
int ten[10];
};
Numbers::Numbers(int a,int b,int c,int d,int e,int f,int g,int h,int i,int j)
{
ten[0] = a; ten[1] = b;
ten[2] = c; ten[3] = d;
ten[4] = e; ten[5] = f;
ten[6] = g; ten[7] = h;
ten[8] = i; ten[9] = j;
}
bool Numbers::operator()(int x)
{
for(int i=0;i<10;i++)
if (ten[i]==x)
return true;
return false;
}
int main()
{
Numbers n1(9,7,1,5,3,11,13,15,17,19);
Numbers n2(4,8,2,6,10,18,12,16,20,14);
cout << "n1 中" << (n1(8)? "含有 ":"不含 ") << 8 << endl;
cout << "n2 中" << (n2(8)? "含有 ":"不含 ") << 8 << endl;
system("PAUSE");
return 0;
}
==============================================
/* 程式檔名:Test_C10-40-5.cpp */
/* 程式目的:請多載>>、<<運算子，代表將物件中的數字做由小到大即大到小的排序*/
/* 程式設計:蘇彥儒*/
/* 完成日期:20150408 */
#include<iostream>
using namespace std;
class Numbers {
public:
Numbers(int,int,int,int,int,int,int,int,int,int);
bool operator()(int);
void operator>>(int);
void operator<<(int);
void show();
private:
int ten[10];
};
void swap(int& a, int& b)
{
int temp = a;
a = b;
b = temp;
}
Numbers::Numbers(int a,int b,int c,int d,int e,int f,int g,int h,int i,int j)
{
ten[0] = a; ten[1] = b;
ten[2] = c; ten[3] = d;
ten[4] = e; ten[5] = f;
ten[6] = g; ten[7] = h;
ten[8] = i; ten[9] = j;
}
bool Numbers::operator()(int x)
{
for(int i=0;i<10;i++)
if (ten[i]==x)
return true;
return false;
}
void Numbers::operator>>(int x)
{
if(x <= 1)
return;
else if (x > 10)
x = 10;
for(int i=0;i<x-1;i++)
for(int j=i+1;j<x;j++)
if (ten[i]<ten[j])
swap(ten[i],ten[j]);
}
void Numbers::operator<<(int x)
{
if(x <= 1)
return;
else if (x > 10)
x = 10;
for(int i=0;i<x-1;i++)
for(int j=i+1;j<x;j++)
if (ten[i]>ten[j])
swap(ten[i],ten[j]);
}
void Numbers::show()
{
for(int i=0;i<10;i++)
cout << ten[i] << ' ';
}
int main()
{
Numbers n1(9,7,1,5,3,11,13,15,17,19);
Numbers n2(4,8,2,6,10,18,12,16,20,14);
cout << "將 n1 前 7 個數字由大到小排序：" ;
n1>>7;
n1.show();
cout << "\n將 n2 全部數字由小到大排序：" ;
n2<<100;
n2.show();
system("PAUSE");
return 0;
}
==============================================
/* 程式檔名:Test_C10-40-6.cpp */
/* 程式目的:請撰寫一個代表圓形的類別，內有圓心坐標及半徑的資料成員：並多載++/--運算子，用以遞增及遞減半徑*/
/* 程式設計:蘇彥儒*/
/* 完成日期:20150408 */
#include<iostream>
using namespace std;
class Circle {
public:
Circle(double, double, double);
Circle& operator++();
Circle& operator--();
void show();
private:
double x,y,r;
};
Circle::Circle(double x, double y, double r)
{
this->x = x;
this->y = y;
this->r = r;
}
Circle& Circle::operator++()
{
r += 1;
return *this;
}
Circle& Circle::operator--()
{
if (r>=1)
r -= 1;
else
r = 0;
return *this;
}
void Circle::show()
{
cout << "圓座標為 (" << x << ',' << y << "), 半徑為 " << r << endl;
}
int main()
{
Circle r1(2.5,3,7);
(++r1).show();
Circle r2(4,1.6,0.5);
(--r2).show();
system("PAUSE");
return 0;
}
==============================================
/* 程式檔名:Test_C10-40-7.cpp */
/* 程式目的:請多載++/--運算子，代表將圓心的x坐標向左及右移動*/
/* 程式設計:蘇彥儒*/
/* 完成日期:20150408 */
#include<iostream>
using namespace std;
class Circle {
public:
Circle(double, double, double);
Circle& operator++();
Circle& operator--();
Circle& operator>>(double);
Circle& operator<<(double);
void show();
private:
double x,y,r;
};
Circle::Circle(double x, double y, double r)
{
this->x = x;
this->y = y;
this->r = r;
}
Circle& Circle::operator++()
{
r += 1;
return *this;
}
Circle& Circle::operator--()
{
if (r>=1)
r -= 1;
else
r = 0;
return *this;
}
Circle& Circle::operator>>(double shift)
{
x += shift;
return *this;
}
Circle& Circle::operator<<(double shift)
{
x -= shift;
return *this;
}
void Circle::show()
{
cout << "圓座標為 (" << x << ',' << y << "), 半徑為 " << r << endl;
}
int main()
{
Circle r1(2.5,3,7);
(r1>>0.5).show();
Circle r2(4,1.6,0.5);
(r2<<4).show();
system("PAUSE");
return 0;
}
==============================================
/* 程式檔名:Test_C10-40-8.cpp */
/* 程式目的:請為Ch10-07.cpp的迷你整數類別設定前置與後置遞減運算子*/
/* 程式設計:蘇彥儒*/
/* 完成日期:20150409 */
#include <iostream>
using namespace std;
class ByteInt{
public:
ByteInt(int i) {c = (char) i;}
void show() {cout << (int) c << endl;}
ByteInt &operator++();
ByteInt operator++(int);
ByteInt &operator--();
ByteInt operator--(int);
private:
char c;
};
ByteInt& ByteInt::operator++()
{
c++;
cout << "前置 ++" << endl;
return *this;
}
ByteInt ByteInt::operator++(int)
{
ByteInt tmp = *this;
c++;
cout << "後置 ++" << endl;
return tmp;
}
ByteInt& ByteInt::operator--()
{
c--;
return *this;
}
ByteInt ByteInt::operator--(int)
{
ByteInt tmp = *this;
c--;
return tmp;
}
int main()
{
ByteInt b(5);
(--b).show();
(b--).show();
b.show();
system("PAUSE");
return 0;
}
==============================================
/* 程式檔名:Test_C10-40-9.cpp */
/* 程式目的:請修改第八張的範例程式Stack堆疊類別，將push()、pop()函式的功能改用>>、<<運算子實作。
(例如若sk為Stack堆疊類別物件，則sk<<5；表示將5放入堆疊中)*/
/* 程式設計:蘇彥儒*/
/* 完成日期:20150409 */
#include <iostream>
#define MaxSize 20
using namespace std;
class Stack {
public:
void init() { sp = 0; }
Stack& operator<<(int);
int operator>>(int&);
private:
int sp;
int buffer[MaxSize];
static void Error() { cout << "\nStack Error\n"; }
};
Stack& Stack::operator<<(int data)
{
if(sp == MaxSize)
Error();
else
buffer[sp++] = data;
return *this;
}
int Stack::operator>>(int& data)
{
if(sp == 0) {
Error();
return 0;
}
data = buffer[--sp];
return data;
}
int main()
{
Stack st1, st2;
st1.init();
st2.init();
st1 << 1 << 2 << 3;
st2 << 7 << 8 << 9;
int i;
cout << (st1>>i);
cout << (st2>>i);
cout << (st1>>i);
cout << (st2>>i);
cout << (st1>>i);
cout << (st2>>i);
system("PAUSE");
return 0;
}
==============================================
/* 程式檔名:Test_C10-40-10.cpp */
/* 程式目的:請設計可讓Stack堆疊類別物件直接用串流物件輸出及輸入的方法*/
/* 程式設計:蘇彥儒*/
/* 完成日期:20150409 */
#include <iostream>
#define MaxSize 20
using namespace std;
class Stack {
friend ostream& operator<<(ostream&, Stack&);
friend istream& operator>>(istream&, Stack&);
public:
void init() { sp = 0; }
Stack& operator<<(int);
int operator>>(int&);
private:
int sp;
int buffer[MaxSize];
static void Error() { cout << "\nStack Error\n"; }
};
Stack& Stack::operator<<(int data)
{
if(sp == MaxSize)
Error();
else
buffer[sp++] = data;
return *this;
}
int Stack::operator>>(int& data)
{
if(sp == 0) {
Error();
return 0;
}
data = buffer[--sp];
return data;
}
ostream& operator<<(ostream& o, Stack& s)
{
if(s.sp==0)
o << "Stack Empty!\n";
else {
for(int i=0;i<s.sp;i++)
o << s.buffer[i] << ' ';
o << endl;
}
return o;
}
istream& operator>>(istream& i, Stack& s)
{
if(s.sp < MaxSize)
i >> s.buffer[s.sp++];
return i;
}
int main()
{
Stack stk;
stk.init();
cout << "請輸入五個要存入堆疊的整數\n";
for(int i=0;i<5;i++)
cin >> stk;
cout << "目前堆疊中所存的數字是：" << stk;
system("PAUSE");
return 0;
}
==============================================
==============================================
/* 程式檔名:Test_C9-39-1.cpp */
/* 程式目的:設計一個Car類別，其資料成員包括油箱目前油量及車重，並設計必要的建構函式，建構函式需檢查參數中的目前油量及車重是否超過指定的上限值*/
/* 程式設計:蘇彥儒*/
/* 完成日期:20150127 */
#include<iostream>
using namespace std;
class Car{
public:
Car(double,double);
void show()
{
cout << "目前油量:" << gas << "目前車重:" << carweight << endl;
}
private:
double gas;
double carweight;
};
Car::Car(double g,double w)
{
if(g > 100)
{
g=100;
cout << "油箱超過重量，自動重設100公升" << endl;
}
gas=g;
if(w > 3000)
{
w=3000;
cout << "車重超過重量，自動重設3000公斤" << endl;
}
carweight=w;
}
int main()
{
Car car1(80,2500);
car1.show();
Car car2(120,2500);
car2.show();
Car car3(50,3200);
car3.show();
system("PAUSE");
return 0;
}
==============================================
/* 程式檔名:Test_C9-39-2.cpp */
/* 程式目的:續上題，請在類別加入一靜態資料成員記錄目前物件總數，並在建構函式及解建構函式中維護正確的物件總數值*/
/* 程式設計:蘇彥儒*/
/* 完成日期:20150127 */
#include<iostream>
using namespace std;
class Car{
public:
Car(double,double);
~Car();
void show()
{
cout << "目前油量:" << gas << "目前車重:" << carweight << endl;
}
int howmanycar()
{
return counter;
}
private:
double gas;
double carweight;
static int counter;
};
int Car::counter=0;
Car::Car(double g,double w)
{
if(g > 100)
{
g=100;
cout << "油箱超過重量，自動重設100公升" << endl;
}
gas=g;
if(w > 3000)
{
w=3000;
cout << "車重超過重量，自動重設3000公斤" << endl;
}
carweight=w;
counter++;
}
Car::~Car()
{
counter--;
}
int main()
{
Car car(80,2500);
cout << "現在有 " << car.howmanycar() << " 輛車" << endl;
Car *car2 = new Car (120,2500);
cout << "現在有 " << car.howmanycar() << " 輛車" << endl;
Car *car3 = new Car (50,3200);
cout << "現在有 " << car.howmanycar() << " 輛車" << endl;
delete car2;
delete car3;
cout << "刪除 car2 car3" << endl;
cout << "現在有 " << car.howmanycar() << " 輛車" << endl;
system("PAUSE");
return 0;
}
==============================================
/* 程式檔名:Test_C9-39-3.cpp */
/* 程式目的:包含一個類別Dates，並在建構函式中初始化一個包含有7個元素的字串陣列，各個元素對應到星期一到星期日的英文縮寫，並提供askDATe()，傳入1~7傳回對應英文縮寫*/
/* 程式設計:蘇彥儒*/
/* 完成日期:20150127 */
#include<iostream>
using namespace std;
class Dates{
public:
Dates();
char* askDate(int);
private:
char* name[7];
int step;
};
Dates::Dates()
{
name[0] = "Mon";
name[1] = "Tue";
name[2] = "Wed";
name[3] = "Thu";
name[4] = "Fri";
name[5] = "Sat";
name[6] = "Sun";
}
char* Dates::askDate(int i)
{
if (i>7)
i=7;
else if (i<1)
i=1;
return name[i-1];
}
int main()
{
Dates date;
cout << "星期一到星期天的英文縮寫是：\n";
for(int i =1;i<=7;i++)
cout << date.askDate(i) << '\t';
cout << endl;
system("PAUSE");
return 0;
}
==============================================
/* 程式檔名:Test_C9-39-4.cpp */
/* 程式目的:承上題，再加入一個方法toChinese()，可用星期的英文縮寫為參數呼叫之，函式會傳回對應的中文星期名稱*/
/* 程式設計:蘇彥儒*/
/* 完成日期:20150306 */
#include<cstring>
#include<iostream>
using namespace std;
class Dates{
public:
Dates();
char *askDate(int);
char *toChinese(char *);
private:
char* name[7];
int step;
};
Dates::Dates()
{
name[0] = "Mon";
name[1] = "Tue";
name[2] = "Wed";
name[3] = "Thu";
name[4] = "Fri";
name[5] = "Sat";
name[6] = "Sun";
}
char* Dates::askDate(int i)
{
if (i>7)
i=7;
else if (i<1)
i=1;
return name[i-1];
}
char* Dates::toChinese(char *chname)
{
static char cname[][7] = {"星期一","星期二","星期三","星期四","星期五","星期六","星期日"};
for (int i=0;i<7;i++)
{
if(strcmp(chname,name[i])==0)
return cname[i];
}
}
int main()
{
Dates date;
for(int i =1;i<=7;i++)
cout << date.askDate(i) << '\t' << date.toChinese(date.askDate(i)) << '\n';
system("PAUSE");
return 0;
}
==============================================
/* 程式檔名:Test_C9-39-5.cpp */
/* 程式目的:修改Clock 類別，增加建構函式可設定目前的時間，另有一setAlarm()成員函式可設定鬧鐘時間
/* 程式設計:蘇彥儒*/
/* 完成日期:20150306 */
#include<iostream>
using namespace std;
class Time{
public:
Time(int h=12, int m=0, int s=0)
{
hour=h; min=m; sec=s;
hour = (h>=0 && h<=23) ? h:12;
min = (m>=0 && m<=59) ? m:0;
sec = (s>=0 && s<=59) ? s:0;
}
void set(int h,int m,int s)
{
hour=h;min=m;sec=s;
}
void show()
{
cout << hour << "點" << min << "分" << sec << "秒" << endl;
}
private:
int hour, min, sec;
};
class Clock{
public:
Clock(int h, int m, int s=0): clock_time(h,m,s) {};
void setAlarm(int h,int m,int s)
{
alarm_time.set(h,m,s);
}
void show();
private:
Time clock_time;
Time alarm_time;
};
void Clock::show()
{
cout << "目前的時間：" << endl;
clock_time.show();
cout << "鬧鐘的時間：" << endl;
alarm_time.show();
}
int main()
{
Clock old_time(10,1,12);
old_time.setAlarm(8,11,10);
old_time.show();
system("PAUSE");
return 0;
}
==============================================
/* 程式檔名:Test_C9-39-6.cpp */
/* 程式目的:請撰寫一個代表矩形類別Rectangle，並提供多種建構方法，例如可以指定左上角頂點座標及長寬值。
/* 程式設計:蘇彥儒*/
/* 完成日期:20150306 */
#include<iostream>
using namespace std;
class Rectangle{
public:
Rectangle(int,int,double,double);
Rectangle(double,double,double,double);
void show()
{
cout << "x1=" << x1 << endl;
cout << "x2=" << x2 << endl;
cout << "y1=" << y1 << endl;
cout << "y2=" << y2 << endl;
}
void showwh()
{
cout << "weigh=" << weight << endl;
cout << "hight=" << hight << endl;
cout << "x1=" << x1 << endl;
cout << "y1=" << y1 << endl;
}
private:
double x1,x2;
double y1,y2;
int weight,hight;
};
Rectangle::Rectangle(double x1,double x2,double y1,double y2)
{
this->x1=x1;
this->x2=x2;
this->y1=y1;
this->y2=y2;
}
Rectangle::Rectangle(int wt,int ht,double x1,double y1)
{
this->weight=wt;
this->hight=ht;
this->x1=x1;
this->y1=y1;
}
int main()
{
Rectangle c1(5,6,4.3,3.5);
c1.showwh();
cout << endl;
Rectangle c2(10.1,10.2,30.6,30.7);
c2.show();
system("PAUSE");
return 0;
}
==============================================
/* 程式檔名:Test_C9-39-7.cpp */
/* 程式目的:請承上題，新增一個成員函式，傳回bool型別，表示該矩形是否為正方形。
/* 程式設計:蘇彥儒*/
/* 完成日期:20150306 */
#include<iostream>
using namespace std;
class Rectangle{
public:
Rectangle(int,int,double,double);
Rectangle(double,double,double,double);
bool checkRe(void);
void show()
{
cout << "x1=" << x1 << endl;
cout << "x2=" << x2 << endl;
cout << "y1=" << y1 << endl;
cout << "y2=" << y2 << endl;
}
void showwh()
{
cout << "weigh=" << weight << endl;
cout << "hight=" << hight << endl;
cout << "x1=" << x1 << endl;
cout << "y1=" << y1 << endl;
}
private:
double x1,x2;
double y1,y2;
int weight,hight;
};
Rectangle::Rectangle(double x1,double x2,double y1,double y2)
{
this->x1=x1;
this->x2=x2;
this->y1=y1;
this->y2=y2;
}
Rectangle::Rectangle(int wt,int ht,double x1,double y1)
{
this->weight=wt;
this->hight=ht;
this->x1=x1;
this->y1=y1;
}
bool Rectangle::checkRe()
{
double x = (x1 > x2) ? (x1 - x2) : (x2 - x1);
double y = (y1 > y2) ? (y1 - y2) : (y2 - y1);
if(x == y)
{
return true;
}
else
{
return false;
}
}
int main()
{
Rectangle c1(5,6,4.3,3.5);
c1.showwh();
cout << endl;
Rectangle c2(4.0,2.0,4.0,2.0);
c2.show();
cout << "是否為正方形:";
if(c2.checkRe())
{
cout << "是" << endl;
}
else
{
cout << "否" << endl;
}
system("PAUSE");
return 0;
}
==============================================
/* 程式檔名:Test_C9-39-8.cpp */
/* 程式目的:圓形類別增加一個建構函式，可用Rectangle物件為參數*/
/* 程式設計:蘇彥儒*/
/* 完成日期:20150306 */
#include<iostream>
using namespace std;
class Rectangle{
public:
Rectangle(int,int,double,double);
Rectangle(double,double,double,double);
bool checkRe(void);
void show()
{
cout << "x1=" << x1 << endl;
cout << "x2=" << x2 << endl;
cout << "y1=" << y1 << endl;
cout << "y2=" << y2 << endl;
}
private:
double x1,x2;
double y1,y2;
int weight,hight;
};
bool Rectangle::checkRe()
{
double x = (x1 > x2) ? (x1 - x2) : (x2 - x1);
double y = (y1 > y2) ? (y1 - y2) : (y2 - y1);
if(x == y)
{
return true;
}
else
{
return false;
}
}
Rectangle::Rectangle(double x1,double x2,double y1,double y2)
{
this->x1=x1;
this->x2=x2;
this->y1=y1;
this->y2=y2;
}
class Circle{
public:
Circle(double,double,double);
Circle(double,double,double,double);
Circle(Rectangle);
double area()
{
return 3.1415926 * r * r;
}
double circum()
{
return 3.1415926 * 2 * r;
}
private:
double x,y;
double r;
};
Circle::Circle(double x0,double y0,double r0 =1)
{
x=x0;
y=y0;
r=r0;
}
Circle::Circle(double x0,double y0,double x1,double y1)
{
double w = min ((x1>x0)?(x1-x0):(x0-x1) , (y1>y0)?(y1-y0):(y0-y1));
r = w/2;
x = x0 + r;
y = y0 + r;
}
Circle::Circle(Rectangle rect1)
{
rect1.show();
cout << "是否為正方形?";
if(rect1.checkRe())
cout << " 是!" << endl;
else
cout << " 否!" << endl;
}
int main()
{
Circle c1(3,5),c2(10,10,30,30);
cout << "c1 的面積為 " << c1.area() << endl;
cout << "c2 的圓周長為 " << c2.circum() << endl;
Rectangle add1(2.0, 2.0, 5.0, 5.0);
Circle c3(add1);
system("PAUSE");
return 0;
}
==============================================
/* 程式檔名:Test_C9-39-9.cpp */
/* 程式目的:請設計一學生類別，內函學號、學生姓名，數學及英文成績，並設計適當的建構函式*/
/* 程式設計:蘇彥儒*/
/* 完成日期:20150309 */
#include<iostream>
using namespace std;
class student{
public:
student(char*,double,double);
void show();
private:
int ID;
static int counter;
char *name;
double math;
double eng;
};
int student::counter=0;
student::student(char* name,double math,double eng)
{
counter++;
ID=99900000 + counter;
this->name=name;
this->math=math;
this->eng=eng;
}
void student::show()
{
cout << "學生ID:" << ID << "\t名子:" << name << "\t數學成績:" <<math << "\t英文成績:" << eng << endl;
}
int main()
{
student* stu[2]={new student("陳小新",80.8,85.2),new student("王曉明",50.8,90.2)};
for(int i =0;i<2;i++)
stu[i]->show();
system("PAUSE");
return 0;
}
==============================================
/* 程式檔名:Test_C9-39-10.cpp */
/* 程式目的:請設計一學生類別，內函學號、學生姓名，數學及英文成績，並設計適當的建構函式*/
/* 程式設計:蘇彥儒*/
/* 完成日期:20150309 */
#include<iostream>
using namespace std;
class student{
public:
student(char*,double,double);
void show();
student(student &);
private:
int ID;
static int counter;
char *name;
double math;
double eng;
};
int student::counter=0;
student::student(student& st)
{
counter++;
name=st.name;
ID=99900000 + counter ;
math=0;
eng=0;
}
student::student(char* name,double math,double eng)
{
counter++;
ID=99900000 + counter;
this->name=name;
this->math=math;
this->eng=eng;
}
void student::show()
{
cout << "學生ID:" << ID << "\t名子:" << name << "\t數學成績:" <<math << "\t英文成績:" << eng << endl;
}
int main()
{
student *stu[2]={new student("陳小新",80.8,85.2),new student("王曉明",50.8,90.2)};
student stua=*stu[1];
for(int i =0;i<2;i++)
stu[i]->show();
stua.show();
system("PAUSE");
return 0;
}
==============================================
