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ÓÃC++µÄstreanstream:
#include <sstream>
#Include <string>
string num2str(double i)
...{
        stringstream ss;
        ss<<i;
        return ss.str();
}
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int str2num(string s)
 ...{  
        int num;
        stringstream ss(s);
        ss>>num;
        return num;
}
ÉÏÃæ·½·¨ºÜ¼ò±ã, ȱµãÊÇ´¦Àí´óÁ¿Êý¾Ýת»»ËٶȽÏÂý..
C libraryÖеÄsprintf, sscanf Ïà¶Ô¸ü¿ì
¿ÉÒÔÓÃsprintfº¯Êý½«Êý×ÖÊä³öµ½Ò»¸ö×Ö·û»º³åÇøÖÐ. ´Ó¶ø½øÐÐÁËת»»...
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ÒÑÖª´Ó0µã¿ªÊ¼µÄÃëÊý(seconds) £¬¼ÆËã³ö×Ö·û´®"H:M:S",  ÆäÖÐHÊÇСʱ, M£½·ÖÖÓ£¬S£½Ãë
         int H, M, S;
        string time_str;
        H=seconds/3600;
        M=(seconds%3600)/60;
        S=(seconds%3600)%60;
        char ctime[10];
        sprintf(ctime, "%d:%d:%d", H, M, S);             // ½«ÕûÊýת»»³É×Ö·û´®
        time_str=ctime;                                                 // ½á¹û
Óësprintf¶ÔÓ¦µÄÊÇsscanfº¯Êý, ¿ÉÒÔ½«×Ö·û´®×ª»»³ÉÊý×Ö
    char    str[] = "15.455";
    int     i;
    float     fp;
    ssca


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