CString、char*、string、int、_bstr_t、CTime、COleDateTime相互转换,判断一个字符串是一个浮点数

#include 
    using namespace std;
    #include
    
    {
     CString strCString="ABC";
     char strchar[256],*pstr;
    
     pstr=(LPSTR)(LPCTSTR)strCString; //CString---->char*
     strcpy(strchar,(LPSTR)(LPCTSTR)strCString); //CString---->char[]
    
     _bstr_t strbstr=pstr; //char*---->_bstr_t
     WCHAR *strWCHAR=strbstr; //b_str_t--->UNICODE
    
     strbstr=strWCHAR;
     pstr=strbstr; //UNICODE---->char*
    
     strCString="10";
     int istr=atoi((LPSTR)(LPCTSTR)strCString); //CString、char[]、char*------>int
     strCString.Format("%d",istr); //int----->CString
     sprintf(strchar,"%d",istr); //int----->char[]
    
     pstr=new char[256]; //字符串申请空间
     strcpy(pstr,"ABC"); //字符串赋值
     delete []pstr; //字符串释放
    
     string strstring="ABC";
     pstr=(char*)strstring.c_str(); //string---->char*
    
     strCString="2003-10-27 6:24:37"; //CString--->COleDateTime
     COleVariant vtime(strCString);
     vtime.ChangeType(VT_DATE);
     COleDateTime time4=vtime;
    
    
    
     COleDateTime time1(1977,4,16,2,2,2); //COleDataTime--->CTime
     SYSTEMTIME systime;
     VariantTimeToSystemTime(time1, &systime);
     CTime tm(systime);
    
     time_t time2=tm.GetTime(); //CTime--->time_t
     COleDateTime time3(time2); //time_t--->COleDateTime
    
     //判断字符串是否是某种类型
     CString sValue("123.1");
     COleVariant vValue(sValue);
    
     BOOL bStrIsFloat = (SUCCEEDED(VariantChangeType(&vValue, &vValue, 0, VT_R8)) && sValue.Find('.') != -1);
     if(bStrIsFloat)
     {
     AfxMessageBox("浮点");
     }
    } 

posted on 2004-09-18 18:04 悠悠小鱼 阅读(...) 评论(...) 编辑 收藏

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