basicstringtool.h

在年级成绩管理系统中

#include <strstream>
namespace BasicStringTool
{
class NumberToString
{
    public:static std::string FromInt(int number)
	{
		char ch[12];
		std::strstream strs(ch,12);
		strs<<number;
		strs<<std::ends;
    	std::string str(ch);
		return str;
	}
	public:static std::string FromFloat(float number)
	{
		char ch[12];
		std::strstream strs(ch,12);
		strs<<number;
		strs<<std::ends;
    	std::string str(ch);
		return str;
	}
};

class StringToInt
{
	public:static int Get(const std::string& str)
	{
		int number=0;
		int len=str.length();
		int temp;
		bool eff=false;
		for(int i=0;i<len;i++)
		{
			temp=str[i]-'0';
			if(temp<0||temp>9)
			{
				if(eff==false)
					continue;
				else
					break;
			}
			number=10*number+temp;
			eff=true;
		}
		return number;
	}
};

class WordFromString
{
	public: static std::string Get(const std::string& strToGet)// const
	{
		bool eff=false;
		int count=0;
		char ch;
		int len=strToGet.length();
		std::string word;
		while(count < len)
		{
			ch=strToGet[count++];
			if((ch<'a'|| ch>'z') && (ch<'A'|| ch>'Z')&&(ch<'0'|| ch>'9'))
			{
				if(eff == false)
					continue;
				else
					break;
			}
			word += ch;
			eff = true;
		}
		return word;
	}
};
}