CString to float/float to Byte/Byte to Float

void CMFCApplication1Dlg::OnBnClickedButton1()
{
    CString strTest;
 
    //CString to float
    CString str;
    GetDlgItemText(IDC_EDIT1, str); 
    float f = _tstof(str);
 
    strTest.Format(_T("%.4f"), f);
    AfxMessageBox(strTest);
    
    //float to Byte
    unsigned char* upt;
    int iCnt;
    upt = (unsigned char*)&f;
 
    strTest.Format(_T("%02X, %02X, %02X, %02X"), upt[3], upt[2], upt[1], upt[0]);
    AfxMessageBox(strTest);
 
    //Byte to float
    unsigned char b[] = { upt[0], upt[1], upt[2], upt[3] }; //4byte
    memcpy(&f, &b, sizeof(float));
 
    strTest.Format(_T("%.4f"), f);
    AfxMessageBox(strTest);
}

//참고 
//CString to float

https://docs.microsoft.com/ko-kr/cpp/c-runtime-library/reference/atof-atof-l-wtof-wtof-l?view=vs-2019

//float to Byte
https://zapiro.tistory.com/entry/4-byte-float-format-float-%ED%98%95%EC%9D%98-%EC%8B%A4%EC%88%98-%EC%A0%80%EC%9E%A5-%EB%B0%A9%EC%8B%9D

//Byte to float

https://mols.tistory.com/10