一个十几行的代码，帮忙改一下，顺便注释一下，两个帖子分数都给他！

[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;
}

[kaihongmail]

还有这个帖子的分：



http://topic.csdn.net/u/20090509/08/bd981996-f01c-4874-b4a5-f74007bd8948.html

[kaihongmail]

只要帮忙这个帖子的分也给他：


http://topic.csdn.net/u/20090509/08/bd981996-f01c-4874-b4a5-f74007bd8948.html

[mengde007]

#include <iostream>
using namespace std;

class date
{ 
public: 
void init(int,int,int); 
    void weekday(); //Date d参数无用；
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一样；
{ 
      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; 

}

[liwenbo29]

除了 将weekDay(Data d) 中的Data d 去掉外 还要在void Date::init(int year,int month,int day) 初始化weekDay()
如：
void Date::init(int year,int month,int day)
{
y=year;
m=month;
d=day;
weekDay();
};

[lzh9955]

学习！

[acdbxzyw]

void Date::weekDay(Date date)
{
    int y = date.y,m=date.m;d=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;
}

再考虑修改。

[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]

[hjjdebug]

给一个参考代码，改动见注释

#include <iostream>
#include <string>
using namespace std;
class Date{
	public:
		Date():y(0),m(0),d(0),week(0){};
		Date(int year,int month,int day);
		void print();

	private:
		void weekDay(void);
		int y;
		int m;
		int d;
		int week;
};
Date::Date(int year,int month,int day)  // 建立构造函数，舍弃init
{
	y=year;
	m=month;
	d=day;
	weekDay();  //计算week
};
void Date::weekDay()  // 不保证正确性，正确性由你自己完成
{
	int v;
	v=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(2009,5,12); //初始化用构造完成，计算星期天由内部完成
	d.print();
	system("pause");
	return 0;
} 

[hack310]

#include <iostream>
#include <string>
using namespace std;
class Date{
public:
void init(int,int,int);
void weekDay(int d); /*这里将Data改为int，因为你这里传入的d是private里的“int d；”，而不是main里的Data类的对象d.当然函数声明里面可以没有参数名，而只有类型int */
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(int d) //理由同上
{
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; //这里的<<符号之间没有空格
cout <<"今天是星期" <<week <<endl; //这里的<<符号之间没有空格
};
int main()
{
Date d;
d.init(2009,5,12);
d.weekDay(12);//这里需要调用weekDay函数来计算一下week的值
d.print();
return 0;
}

[amossavez]

怎么发了两个帖子了？？、

[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; 
} 

[hw324306893]

3楼OK

[freestyIe]

3楼正确

[fellatioyzx]

纯学习

[Rain_yun]

里面<<用的不对吧

[zhangzhongke007]

学到了很多！

[cheneyjiang]

答案在3楼，不过对于初始化我建议你参看9楼的！9楼的做法更有效率