一個天氣預報的類

看了boost庫的正則表達式後寫的。。。

代碼:

#include <string>
#include <boost/regex.hpp>
#include <iostream>
#include <fstream>
#include <windows.h>
class weather
{
public:
	weather(std::string sprovince="guangdong",std::string sposition="guangzhou"):_province(sprovince),_position(sposition) {}
	void flash();
	void clear() {	_date.clear();_weather.clear();_tem.clear();_wind.clear();}
	std::string get_day(int day);
	const std::string& get_date(int day=0) {return _date[day];}
	const std::string& get_weather(int day=0) {return _weather[day];}
	const std::string& get_temperature(int day=0) {return _tem[day];}
	const std::string& get_wind(int day=0) {return _wind[day];}
	friend std::ostream& operator<<(std::ostream& out,weather& wea);
	void change_city(std::string s) {_position=s;}
	void change_province(std::string s) {_province=s;}
	void change(std::string sprovince,std::string sposition) {change_city(sprovince);change_province(sposition);}
	const std::string& get_city() {return _position;}
	const std::string& get_province() {return _province;}
private:
	std::vector<std::string>_date;
	std::vector<std::string>_weather;
	std::vector<std::string>_tem;
	std::vector<std::string>_wind;
	std::string _province;
	std::string _position;
	void remove_file();
	void _downloadfile();
};
void weather::_downloadfile()
{
	char buf[200],storage[230],storage2[100]; //分別儲存目錄路徑,文件路徑,獲取天氣的地址
	GetCurrentDirectoryA(sizeof(buf),buf);
	sprintf_s(storage,"%s\\%s.htm",buf,_position.c_str());
	sprintf_s(storage2,"http://qq.ip138.com/weather/%s/%s.htm",_province.c_str(),_position.c_str());
	URLDownloadToFileA(0,storage2,storage,0,0);
}
void weather::remove_file()
{
	char buf[200],storage[230];
	GetCurrentDirectoryA(sizeof(buf),buf);
	sprintf_s(storage,"%s\\%s.htm",buf,_position.c_str());
	remove(storage);
}
std::ostream& operator<<(std::ostream& out,weather& wea)
{
	for(std::vector<std::string>::size_type i=0;i<wea._date.size();++i)
	{
		out<<wea._date[i].c_str()<<" "<<wea._weather[i].c_str()<<" "<<wea._tem[i].c_str()<<" "<<wea._wind[i].c_str();
		if(i!=wea._date.size()-1) out<<std::endl;
	}
	return out;
}
std::string weather::get_day(int day=0)
{
	return _date[day]+" "+_weather[day]+" "+_tem[day]+" "+_wind[day];
}
void weather::flash()
{
	clear();
	_downloadfile();
	boost::regex regdate(";\">(\\d{4}-\\d{1,2}-\\d{1,2} [^<]*)</td>");
	boost::regex regweather(" /><br/>([^<]*)</td>");
	boost::regex regtem("<td>(\\d{1,2}℃～\\d{1,2}℃)</td>");
	boost::regex regwind("<td>([^<0-9]+\\d?.?\\d?\\w*)</td>");	
	boost::smatch result;
	std::string temp;
	std::string::const_iterator csbegin;
	std::vector<std::string>vecstr;
	std::ifstream ifile(_position+".htm");
	while(getline(ifile,temp))
	{
		vecstr.push_back (temp);
	}
	ifile.close();
	for(std::vector<std::string>::const_iterator it=vecstr.begin();it!=vecstr.end();++it)
	{
		csbegin=it->begin();          //獲取日期
		while(regex_search(csbegin,it->end(),result,regdate))
		{
			_date.push_back(result[1]);
			csbegin=result[0].second;
		}
		csbegin=it->begin();          //獲取天氣
		while(regex_search(csbegin,it->end(),result,regweather))
		{
			_weather.push_back(result[1]);
			csbegin=result[0].second;
		}
		csbegin=it->begin();          //獲取溫度
		while(regex_search(csbegin,it->end(),result,regtem))
		{
			_tem.push_back(result[1]);
			csbegin=result[0].second;
		}
		csbegin=it->begin();          //獲取風力
		while(regex_search(csbegin,it->end(),result,regwind))
		{
			_wind.push_back(result[1]);
			csbegin=result[0].second;
		}
	}
	remove_file();
}

調用:

int main()
{
	weather myweather,myweather2("guangdong","chaozhou");
	myweather.flash();                   //刷新天氣
	std::cout<<"廣州:"<<std::endl;
	std::cout<<myweather<<std::endl<<std::endl;               //輸出7天內的天氣
	myweather2.flash();
	std::cout<<"潮州:"<<std::endl;
	std::cout<<myweather2<<std::endl;
	system("pause>nul");
}

運行截圖:

(注:UrlDownloadToFile需要鏈接UrlMon.lib坑死了。。添加windows.h就只爲了用這貨。。。)