Thread: calculting different inputs

i want that a person input the year he/she was born
that is inputted into an edit box called IDC_year with a member variable of double m_Year
the current year is located on top with a group box called IDC_CURRENT_AGE with a member variable of CButton m_Current_Age

I added a private called m_Your_Age
I initialized it with m_Your_Age = 2001;

I initialized m_Year with NULL

now i want that when the person hit submit the year that was put in m_Year to be subtracted from m_Current_Age

void CAgeDlg::OnCancel()
{
// TODO: Add your control notification handler code here
CString s;
s.Format("You are %.0f years old",m_Your_Age);
MessageBox(s, "Your age is...");
CDialog::OnCancel();
}






void CAgeDlg::CalculateAge()
{
if (m_Year < 2001)
{
(m_Your_Age -= m_Year);
}
}

void CAgeDlg::OnSubmit()
{
// 1.
(m_Your_Age -= m_Year);

// 2.
CalculateAge();

// 3.
CString s;
s.Format("You are %.0f years old", m_Your_Age);

m_Current_Age.SetWindowText(s);
}

As long as you've attached m_Year to your edit control (with the Class Wizard), just call UpdateData(TRUE) before calling CalculateAge().

it worked

is there a way to clear the number and return it to its original amount without leaving the screen?