CString 與 double 互轉

1、CString To double

double dSum2;
#ifdef UNICODE
char szNum[100];
wcstombs(szNum, m_strResult.GetBuffer(0), sizeof(szNum) / sizeof(szNum[0]));
 dSum2 = atof(szNum);
 #else
dSum2 = atof(m_strResult.GetBuffer(0));
#endif

方法二：

double dSum = _tcstod(m_strResult.GetBuffer(0), NULL);

2、double to CString

strNum.Format(_T("%lf"), dNum);