帮忙改下代码，并稍加注释。

[kaihongmail]

显示星期几的一个程序，谢谢啦：

#include <iostream>
#include <string>
using namespace std;
class Date{
public:
void init(int,int,int);
void weekDay(Date d);
void print();

private:
int y;
int m;
int d;
int week;
};
void Date::init(int year,int month,int day)
{
y=year;
m=month;
d=day;
};
void Date::weekDay(Date d)
{
y=y%100;
if(m==1) {m=13;y=y-1;}
else
if(m==2) {m=14;y=y-1;}
week=(26*(m+1)/10+y+y/4-2*y/100+y/400+d-1)%7;
}
void Date::print()
{
cout < <y < <"年" < <m < <"月" < <d < <"日" < <endl;
cout < <"今天是星期" < <week < <endl;
};
int main()
{
Date d;
d.init(2009,5,12);
d.print();
return 0;
}

[mengde007]

#include <iostream>
using namespace std;

class date
{ 
public: 
void init(int,int,int); 
    void weekday(); 
void print(); 

private: 
int y; 
int m; 
int d; 
int week; 
}; 

void date::init(int year,int month,int day) 
{ 
  y=year; 
  m=month; 
  d=day; 
}

void date::weekday() //Date d此参数为多余的；
{ 
      y=y%100; 
      if(m==1) {m=13;y=y-1;} 
      else if
		  (m==2) {m=14;y=y-1;} 
      week=(26*(m+1)/10+y+y/4-2*y/100+y/400+d-1)%7; 
} 

void date::print() 
{ 
cout <<y <<"年" <<m <<"月" <<d <<"日" <<endl; 
cout <<"今天是星期" <<week <<endl; 
}

int main() 
{ 

date d; 
d.init(2009,5,12); 
d.weekday();
d.print(); 
return 0; 

} 

[lingyin55]

#include <iostream> 
#include <string> 
using namespace std; 
class Date{ 
public: 
void init(int,int,int); 
    void weekDay(); /////////////去掉参数
void print(); 

private: 
int y; 
int m; 
int d; 
int week; 
}; 
void Date::init(int year,int month,int day) 
{ 
  y=year; 
  m=month; 
  d=day; 
}; 
void Date::weekDay() //////去掉参数，d是成员变量，直接可以使用
{ 
      y=y%100; 
      if(m==1) {m=13;y=y-1;} 
      else 
      if(m==2) {m=14;y=y-1;} 
      week=(26*(m+1)/10+y+y/4-2*y/100+y/400+d-1)%7; 
} 
void Date::print() 
{ 
cout <<y <<"年" <<m <<"月" <<d <<"日" <<endl; 
cout <<"今天是星期" <<week <<endl; 
}; 
int main() 
{ 
Date d; 
d.init(2009,5,12); 
d.print(); 
return 0; 
} 

[哈利路亚1874]

我想提醒一下楼主，你的代码风格不规范；
帮你纠正一下，功能楼上的已经帮你实现了
void init(int,int,int);————>void init(int year,int month,int day);
void print();————>void print(void);
if(m==1)
{
m=13;y=y-1;
}
else
if(m==2)
{
m=14;y=y-1;
}
week=(26*(m+1)/10+y+y/4-2*y/100+y/400+d-1)%7;
其他的你也要规范一下，这对开发来说是很重要的，希望楼主不要忽略！

[猫已经找不回了]

class Date{ 
public: 
void init(int,int,int); 
    void weekDay();          //这里不需要Date d形参
void print(); 

private: 
int y; 
int m; 
int d; 
int week; 
}; 
void Date::init(int year,int month,int day) 
{ 
  y=year; 
  m=month; 
  d=day; 
}; 
void Date::weekDay() 
{ 
      y=y%100; 
      if(m==1) {m=13;y=y-1;} 
      else 
      if(m==2) {m=14;y=y-1;} 
      week=(26*(m+1)/10+y+y/4-2*y/100+y/400+d-1)%7; 
} 
void Date::print() 
{ 
cout <<y <<"年" <<m <<"月" <<d <<"日" <<endl; 
cout <<"今天是星期" <<week <<endl; 
}; 
int main() 
{ 
Date d; 
d.init(2009,5,12); 
d.print(); 
return 0; 
} 

[猫已经找不回了]

[code=C/C++]
class Date{ 
public: 
void init(int,int,int); 
    void weekDay();          //这里不需要Date d形参
void print(); 

private: 
int y; 
int m; 
int d; 
int week; 
}; 
void Date::init(int year,int month,int day) 
{ 
  y=year; 
  m=month; 
  d=day; 
}; 
void Date::weekDay() 
{ 
      y=y%100; 
      if(m==1) {m=13;y=y-1;} 
      else 
      if(m==2) {m=14;y=y-1;} 
      week=(26*(m+1)/10+y+y/4-2*y/100+y/400+d-1)%7; 
} 
void Date::print() 
{ 
cout <<y <<"年" <<m <<"月" <<d <<"日" <<endl; 
cout <<"今天是星期" <<week <<endl; 
}; 
int main() 
{ 
Date d; 
d.init(2009,5,12); 
d.print(); 
return 0; 
} 

[/code]

[lingyin55]

运行结果，数据也改好了，看看吧

2009年5月12日
今天是星期tuesday
请按任意键继续. . .

#include <iostream> 
#include <string> 
using namespace std; 

const char *name[] = { "monday",//////定义一个数组，用于显示星期几
                 "tuesday",
                 "wednesday",
                "thursday",
                "friday",
                "saturday",
                "sunday"
               };


class Date{ 
public: 
void init(int,int,int); 
    void weekDay(); 
void print(); 

private: 
int y; 
int m; 
int d; 
int week; 
}; 
void Date::init(int year,int month,int day) ///////初始化年月日
{ 
  y=year; 
  m=month; 
  d=day; 
  weekDay();//////根据初始化的年月日计算星期几
}; 
void Date::weekDay() ///////////计算星期的实现
{ 
	  if ((m == 1) || (m == 2)){
		m += 12;
		y--;
	  }

      week = (d + 2*m + 3*(m+1)/5 + y + y/4 - y/100 + y/400) % 7;
} 
void Date::print() ///////////////打印
{ 
cout <<y <<"年" <<m <<"月" <<d <<"日" <<endl; 
cout <<"今天是星期" <<name[week] <<endl; 
}; 
int main() 
{ 
Date d; ///////////定义类对象
d.init(2009,5,12); ////////////初始化
d.print(); ////////////打印
return 0; 
} 

[amossavez]

这个能运行通过，你看看！！

#include <iostream> 
//#include <string> 
using namespace std; 
class Date{ 
public: 
	Date(){};
	~Date(){};
	void init(int,int,int); 
	void weekDay(); 
	void print(); 

private: 
	int y; 
	int m; 
	int d; 
	int week; 
};
void Date::init(int year,int month,int day) 
{ 
	y=year; 
	m=month; 
	d=day; 
}
void Date::weekDay() 
{ 
	y=y%100; 
	if(m==1) {m=13;y=y-1;} 
	else 
		if(m==2) {m=14;y=y-1;} 
		week=(26*(m+1)/10+y+y/4-2*y/100+y/400+d-1)%7; 
} 
void Date::print() 
{ 
	cout <<y <<"年" <<m <<"月" <<d <<"日" <<endl; 
	cout <<"今天是星期" <<week <<endl; 
}
int main() 
{ 
	Date d; 
	d.init(2009,5,12);
	d.weekDay();
	d.print(); 
	return 0; 
} 

[霍大脚]

小程序自己打开VC慢慢改啊，不要一味让别人改