string 用法小结

  1 long  to  char *

        char basetime[32];
long mBaseTime;
mBaseTime = (long)time(NULL);
memset(basetime,0,sizeof(basetime));
ltoa(mBaseTime,basetime,10);

        basetime：“1345636789”

2 char * to  string

      string strtime;
      strtime= basetime;

3 分割字符

    strtime = strtime.substr(5,5);

        strtime：“36789”

4 char* to long

      msgid = atol(strtime.c_str());