C++2回目の実験作業
9195 ワード
一、プログラムを読み、実行した後、要求に応じてクラスの機能を追加する.
二、正の整数類:
三、Book類
四、学生の成績
#include <iostream>
using namespace std;
class Time
{
public:
void set_time( );
void show_time( );
void add_an_hour()
{
hour++;
}
void add_a_minute()
{
minute++;
if(minute>=60)
{
add_an_hour();
minute=0;
}
}
void add_a_sec()
{
sec++;
if(sec>=60)
{
add_a_minute();
sec=0;
}
}
void add_seconds(int n); // n
void add_minutes(int n); // n
void add_hours(int n);
private:
bool is_time(int, int, int);
int hour;
int minute;
int sec;
};
void Time::set_time( )
{
char c1,c2;
cout<<" ( hh:mm:ss)";
while(1)
{ cin>>hour>>c1>>minute>>c2>>sec;
if(c1!=':'||c2!=':')
cout<<" , "<<endl;
else if (!is_time(hour,minute,sec))
cout<<" , "<<endl;
else
break;
}
}
void Time::show_time( )
{
cout<<hour<<":"<<minute<<":"<<sec<<endl;
}
bool Time::is_time(int h,int m, int s)
{
if (h<0 ||h>24 || m<0 ||m>60 || s<0 ||s>60)
return false;
return true;
}
void Time::add_hours(int n)
{
hour+=n;
}
void Time::add_minutes(int n)
{
minute+=n;
if(minute>60)
{
hour+=minute/60;
minute%=60;
}
}
void Time::add_seconds(int n)
{
sec+=n;
if(sec>60)
{
add_minutes(sec/60);
sec/=60;
}
}
int main( )
{
Time t1;
int n;
t1.set_time( );
t1.show_time( );
cout<<"
:";
t1.add_a_sec();
t1.show_time( );
cout<<endl;
cout<<" :";
t1.add_a_minute();
t1.show_time( );
cout<<endl;
cout<<"
:";
t1.add_an_hour();
t1.show_time( );
cout<<"
:";
cin>>n;
cout<<"
"<<n<<" :";
t1.add_seconds(n);
t1.show_time( );
cout<<"
:";
cin>>n;
cout<<"
"<<n<<" :";
t1.add_minutes(n);
t1.show_time( );
cout<<"
:";
cin>>n;
cout<<"
"<<n<<" :";
t1.add_hours(n);
t1.show_time( );
return 0;
}
二、正の整数類:
#include<iostream>
using namespace std;
class NaturalNumber
{
public:
int setValue (int x);// n ,
int getValue(); // n
bool isPrime(); // n , true, false
void printFactor(); // n , 1 n
bool isPerfect(); // n 。 n n n, n , 6=1+2+3 。
bool isReverse(int x);// x n ( 321 123 )。
bool isDaffodil(int x); // x 。 , 153=1*1*1+5*5*5+3*3*3
void print_Daffodils(); // 1, n ;
private:
int n;
};
int NaturalNumber::setValue (int x)
{
if(x>0) n=x;
else {cout<<"x
"; return -1;}
}
int NaturalNumber::getValue()
{
return n;
}
bool NaturalNumber::isPrime()
{
int i=2;
if(n==1) return 0;
else
{
for(i=2;i*i<=n;i++)
{
if(n%i==0)
return 0;
}
}
return 1;
}
void NaturalNumber::printFactor()// n , 1 n
{
for(int i=1;i<=n;i++)
if(n%i==0) cout<<i<<" ";
cout<<endl;
}
bool NaturalNumber::isPerfect()// n 。 n n n, n , 6=1+2+3 。
{
int s;
for(int i=1;i<n;i++)
{
if(n%i==0) s+=i;
}
if(s==n) return 1;
else return 0;
}
bool NaturalNumber::isReverse(int x)// x n ( 321 123 )。
{
int a[20],m=n,i;
for(i=0;m;i++)
{
a[i]=m%10;
m/=10;
}
while(i>0||x)
{
if(a[--i]!=x%10) return 0;
x/=10;
}
return 1;
}
bool NaturalNumber::isDaffodil(int x)// x 。 , 153=1*1*1+5*5*5+3*3*3
{
int s=0,m=x;
while(m)
{
s+=(m%10)*(m%10)*(m%10);
m/=10;
}
if(x==s) return 1;
else return 0;
}
void NaturalNumber::print_Daffodils()// 1, n ;
{
for(int i=1;i<n;i++)
{
if(isDaffodil(i)) cout<<i<<" ";
}
cout<<endl;
}
int main()
{
int n;
NaturalNumber nn; // ( )
nn.setValue (5);
cout<<nn.getValue()<<(nn.isPrime()?" ":" ")<<" "<<endl;
cout<<nn.getValue()<<( nn.isPerfect()?" ":" ")<<" "<<endl;
nn.setValue (59);
cout<<nn.getValue()<<(nn.isPrime()?" ":" ")<<" " <<endl;
cout<<nn.getValue()<<(nn.isPerfect()?" ":" ")<<" "<<endl;
cout<<nn.getValue()<<" :";
cin>>n;
while(!nn.isReverse(n))
{
cout<<" , :";
cin>>n;
}
cout<<"
";
nn.setValue (81);
cout<<nn.getValue()<<(nn.isPrime()?" ":" ")<<" " <<endl;
cout<<nn.getValue()<<(nn.isPerfect()?" ":" ")<<" "<<endl;
cout<<nn.getValue()<<" :";
cin>>n;
while(!nn.isReverse(n))
{
cout<<" , :";
cin>>n;
}
cout<<"
";
cout<<nn.getValue()<<" :";
nn.printFactor();
nn.setValue (999);
cout<<nn.getValue()<<" :
";
nn.print_Daffodils();
// , 。 ……
}
三、Book類
#include<iostream>
#include<string>
using namespace std;
class Book
{
public:
void setBook(string n,string w,string p,int pr,int nu,string N);
void borrow();
void restore();
void print();
void set_NO(string N);
string get_NO();
private:
string name,writer,publicer,NO;
int price,number;
};
void Book::setBook(string n,string w,string p,int pr,int nu,string N)
{
name=n;
writer=w;
publicer=p;
price=pr;
number=nu;
NO=N;
}
void Book::borrow()
{
number--;
}
void Book::restore()
{
number++;
}
void Book::print()
{
cout<<" :"<<name<<endl;
cout<<" :"<<writer<<endl;
cout<<" :"<<publicer<<endl;
cout<<" :"<<NO<<endl;
cout<<" :"<<price<<endl;
cout<<" :"<<number<<endl;
cout<<endl;
}
void Book::set_NO(string N)
{
NO=N;
}
string Book::get_NO()
{
return NO;
}
int main()
{
Book book1,book2;
book1.setBook(" "," "," ",45,56,"ISBN 978-7-5357-3230-9");
book2.setBook(" "," "," ",24,16,"ISBN 978-7-03-018442-9");
book1.borrow();
book1.print();
book2.restore();
book2.print();
book2.set_NO("ISBN 111-1-1111-1111-1");
book2.print();
return 0;
}
四、学生の成績
#include<iostream>
#include<string>
using namespace std;
class Stu
{
public:
void setStudent(string na,int c,int m);
void show();
void setName(string na);
string getName();
float average();
private:
string name; //
float chinese; //
float math; //
float ave;
float sum;
};
void Stu::setName(string na)
{
name=na;
}
void Stu::setStudent(string na,int c,int m)
{
name=na;
chinese=c;
math=m;
sum=math+chinese;
ave=sum/2;
}
void Stu::show()
{
cout<<"Name: "<<name<<endl;
cout<<"Score: "<<chinese<<" "<<math<<endl;
cout<<"average: "<<ave<<" Sum: "<<sum<<endl;
cout<<endl;
}
string Stu::getName()
{
return name;
}
float Stu::average()
{
return ave;
}
int main()
{
Stu s1,s2;
s1.setStudent("Lin daiyu", 98, 96); //
s2.setStudent("Jia baoyu", 90, 88); //
s1.show();//
s2.show();//
s1.setName("xue baochai");// p1
s1.show();
cout<<"s1.Name: "<<s1.getName()<<endl;//
cout<<"s1.average: "<<s1.average()<<endl;//
return 0;
}