Pray god to help solve, thank you very much!

CodePudding user response:

Application wizard generates a based on the MFC dialog application, under the resource editor to add several static string and edit box, associated control and variable, the OnOK calculation and output...
Which has a problem?

CodePudding user response:

entry level problem, is not function work? Or did not know how to use controls, or you want a whole procedure,

CodePudding user response:

How to output in an edit box x1 x2==results
Edit box code, please answer!

CodePudding user response:

 

#include  

Void CDlg1Dlg: : OnBnClickedOk () 
{
//TODO: add the control notification handler code 

//a * x ^ 2 + b * x + c=0; 
Double a=0, b=0, c=0; 

Cstrings szItem; 
//value from the Edit 
GetDlgItemText (IDC_EDIT_X2 szItem); 
A=_tcstod (szItem, NULL); 
GetDlgItemText (IDC_EDIT_X1 szItem); 
B=_tcstod (szItem, NULL); 
GetDlgItemText (IDC_EDIT_C szItem); 
C=_tcstod (szItem, NULL); 

SzItem. Empty (); 
If (a==0)//a equation 
{
If (b==0) 
{
If (c==0) 
{
Any szItem=_T (" "); 
} 
The else 
{
SzItem. The Format (_T (" Error (% lf==0)????? "), c); 
} 
} 
The else 
{
//x=- c/b 
SzItem. The Format (_T (" x=% lf "), - c/b); 
} 
} 
The else//quadratic equation 
{
//x=(a - b + SQRT (b ^ 2-4 ac))/2 a 
Double ft=b * * a * b - 4 c. 
If (ft<0) 
{
SzItem. The Format (_T (" Error (ac) b2-4=% lf & lt; 0 "), ft); 
} 
Else if (ft==0) 
{
Double x=(a - b)/(2 * a); 
SzItem. The Format (_T (" x=% lf "), x); 
} 
The else 
{
Double x1=(a - b + SQRT (ft))/(2 * a); 
Double x2=(a - b - SQRT (ft))/(2 * a); 
SzItem. The Format (_T (" x1=% lf, x2=% lf "), x1, x2); 
} 
} 
//output 
SetDlgItemText (IDC_OUT_X szItem); 

} 

CodePudding user response:

Positive solution upstairs!!!!!