This code is used in a simple example calculator. It has a text box that
displays the result. It performs addition, subtraction, multiplication, etc.
on two operands. For the operands it accepts digits 0..9 and a decimal
point. The insert() method isn't very clear to me. Can anyone help me
convert the code shown below to C#?
Thanks!
enum { PRECISION = 14 };
//-------------------------------------------------------------------
void Calc::clear() {
myDisplay[0] = ' ';
myDisplay[1] = '0';
myDisplay[2] = '\0';
myIns = &myDisplay[1];
SetDlgItemText( myHwnd, IDC_DISPLAY, myDisplay);
}
//............... ............... ............... ............... .......
void Calc::insert(in t keyId) {
if (myIns < &myDisplay[PRECISION - 1]) {
*myIns++ = (keyId == IDC_POINT) ? '.' : keyId - IDC_0 + '0';
*myIns = '\0';
SetDlgItemText( myHwnd, IDC_DISPLAY, myDisplay);
}
}
class Calc {
public:
Calc() {}
// helper methods...
void clear();
void insert(int keyId);
private:
char myDisplay[40];
char *myIns;
}; 2 2511
Hello Mountain
Apparently the insert function is called in response to a button click, it
checks it the length of the text displayed is less than 14, if so appends
the key text to the string and updates the display.
A c# equivalent would be something like this
void CalcButton_Clic k(object sender, EventArgs e)
{
if(txtDisplay.T ext.Length < 14)
{
Button btn = (Button)sender;
txtDisplay.Text += btn.Text;
}
}
Best regards,
Sherif
"Mountain Bikn' Guy" <vc@attbi.com > wrote in message
news:Ws8Cb.5043 26$HS4.3902552@ attbi_s01... This code is used in a simple example calculator. It has a text box that displays the result. It performs addition, subtraction, multiplication,
etc. on two operands. For the operands it accepts digits 0..9 and a decimal point. The insert() method isn't very clear to me. Can anyone help me convert the code shown below to C#? Thanks!
enum { PRECISION = 14 };
//------------------------------------------------------------------- void Calc::clear() { myDisplay[0] = ' '; myDisplay[1] = '0'; myDisplay[2] = '\0'; myIns = &myDisplay[1]; SetDlgItemText( myHwnd, IDC_DISPLAY, myDisplay); } //............... ............... ............... ............... ....... void Calc::insert(in t keyId) { if (myIns < &myDisplay[PRECISION - 1]) { *myIns++ = (keyId == IDC_POINT) ? '.' : keyId - IDC_0 + '0'; *myIns = '\0'; SetDlgItemText( myHwnd, IDC_DISPLAY, myDisplay); } }
class Calc { public: Calc() {}
// helper methods... void clear(); void insert(int keyId);
private: char myDisplay[40]; char *myIns; };
Hi Sherif,
Thanks for your reply. In the C code was trying to figure out how the
decimal place and leading zero were handled. At first glance it seemed to be
in the code I posted. I assumed the variable that held the address of the
current string element (myIns) was helping handle this logic, but that
doesn't seem to be the case.
I ended up writing the following code, but it is some really crappy code.
I'm going to have to look deeper and refactor a few things...
private void Insert(char keyChar)
{
if (this.myDisplay .Length < PRECISION)
{
if (keyChar != '.')//TODO: clean this logic up
{
if (myDisplay == " 0")
{
this.myDisplay = " ";
}
else if (myDisplay == "-0")
{
this.myDisplay = "-";
}
}
this.myDisplay += keyChar.ToStrin g();
mainForm.Displa yTextBox = myDisplay;
}
}
If you have any other suggestions, let me know. Thanks!
Regards,
Mountain
"Sherif ElMetainy" <el************ *@wayout.net.NO SPAM> wrote in message
news:eG******** ******@TK2MSFTN GP09.phx.gbl... Hello Mountain
Apparently the insert function is called in response to a button click, it checks it the length of the text displayed is less than 14, if so appends the key text to the string and updates the display. A c# equivalent would be something like this
void CalcButton_Clic k(object sender, EventArgs e) { if(txtDisplay.T ext.Length < 14) { Button btn = (Button)sender; txtDisplay.Text += btn.Text; } }
Best regards, Sherif
"Mountain Bikn' Guy" <vc@attbi.com > wrote in message news:Ws8Cb.5043 26$HS4.3902552@ attbi_s01... This code is used in a simple example calculator. It has a text box that displays the result. It performs addition, subtraction, multiplication, etc. on two operands. For the operands it accepts digits 0..9 and a decimal point. The insert() method isn't very clear to me. Can anyone help me convert the code shown below to C#? Thanks!
enum { PRECISION = 14 };
//------------------------------------------------------------------- void Calc::clear() { myDisplay[0] = ' '; myDisplay[1] = '0'; myDisplay[2] = '\0'; myIns = &myDisplay[1]; SetDlgItemText( myHwnd, IDC_DISPLAY, myDisplay); } //............... ............... ............... ............... ....... void Calc::insert(in t keyId) { if (myIns < &myDisplay[PRECISION - 1]) { *myIns++ = (keyId == IDC_POINT) ? '.' : keyId - IDC_0 + '0'; *myIns = '\0'; SetDlgItemText( myHwnd, IDC_DISPLAY, myDisplay); } }
class Calc { public: Calc() {}
// helper methods... void clear(); void insert(int keyId);
private: char myDisplay[40]; char *myIns; };
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