Application gestion financière en langage C

Application gestion financière en langage C

Cet article propose en détaille une application de gestion financière en langage C.

Vous pourrez télécharger le fichier au format zip il contient le code sources complet

Extrait du code source :

#include "MyMainWindow.h"

// identification des controles et boutons

#define IDC_BTNGRP_FREQUENCY 100

#define IDC_BTNOPT_BIANNUAL 101

#define IDC_BTNOPT_QUATERLY 102

#define IDC_BTNOPT_MONTHLY 103

#define IDC_STC_AMOUNT 200

#define IDC_EDT_AMOUNT 201

#define IDC_STC_RATE 210

#define IDC_EDT_RATE 211

#define IDC_BTN_COMPUTE 300

#define IDC_BTN_CLEAR 310

#define IDC_LSB_RESULTS 400

#define IDC_SB 410

// gestionnaire des messages

BEGIN_MESSAGE_MAP(CMyMainWindow, CFrameWnd)

            ON_WM_PAINT()

            ON_EN_SETFOCUS(IDC_EDT_AMOUNT, OnAmountFocus)

            ON_EN_SETFOCUS(IDC_EDT_RATE, OnRateFocus)

            ON_EN_KILLFOCUS(IDC_EDT_RATE, OnRateKillFocus)

            ON_EN_KILLFOCUS(IDC_EDT_AMOUNT, OnAmountKillFocus)

            ON_BN_CLICKED(IDC_BTN_CLEAR, OnClickClear)

            ON_BN_CLICKED(IDC_BTN_COMPUTE, OnClickCompute)

            ON_LBN_DBLCLK(IDC_LSB_RESULTS, OnDblClickResults)

END_MESSAGE_MAP()

CMyMainWindow::CMyMainWindow()

{

            // cree la fenetre principale

            Create(NULL, _T("My WinApp"), WS_OVERLAPPEDWINDOW,

                             CRect(0, 0, 450, 450));

            // cree les boutons,controles,bars de status et la list box

            btnGrpFrequency.Create(_T("FREQUENCY"), WS_CHILD|WS_VISIBLE|BS_GROUPBOX|WS_GROUP,

                                             CRect(CPoint(10,10), CSize(100,120)),

this, IDC_BTNGRP_FREQUENCY);

            btnGrpBiAnnual.Create(_T("Bi Annual"), WS_CHILD|WS_VISIBLE|BS_AUTORADIOBUTTON,

                                             CRect(CPoint(15,35), CSize(90,25)),

this, IDC_BTNOPT_BIANNUAL);

            btnGrpQuaterly.Create(_T("Quaterly"), WS_CHILD|WS_VISIBLE|BS_AUTORADIOBUTTON,

                                             CRect(CPoint(15,60), CSize(90,25)),

this, IDC_BTNOPT_QUATERLY);

            btnGrpMonthly.Create(_T("Monthly"), WS_CHILD|WS_VISIBLE|BS_AUTORADIOBUTTON,

                                             CRect(CPoint(15,85), CSize(90,25)),

this, IDC_BTNOPT_MONTHLY);

            stcAmount.Create(_T("Amount"), WS_CHILD|WS_VISIBLE|SS_RIGHT,

                                       CRect(CPoint(120,40),CSize(100,25)),

this, IDC_STC_AMOUNT);

            edtAmount.Create(WS_CHILD|WS_VISIBLE|WS_BORDER,

                                       CRect(CPoint(230,40),CSize(75,25)),

                                                                                                          this, IDC_EDT_AMOUNT);

            stcAnnualRate.Create(_T("Annual rate"), WS_CHILD|WS_VISIBLE|SS_RIGHT,

                                       CRect(CPoint(120,85),CSize(100,25)),

                                                                                                          this, IDC_STC_RATE);

            edtAnnualRate.Create(WS_CHILD|WS_VISIBLE|WS_BORDER,

                                       CRect(CPoint(230,85),CSize(75,25)),

                                                                                                          this, IDC_EDT_RATE);

            btnComputeInterest.Create(_T("Compute"), WS_CHILD|WS_VISIBLE|BS_DEFPUSHBUTTON,

                                                CRect(CPoint(60,150),CSize(100,25)),                                                                                                                                                                this, IDC_BTN_COMPUTE);

            btnClearList.Create(_T("Clear list"), WS_CHILD|WS_VISIBLE|BS_PUSHBUTTON,

                                               CRect(CPoint(170,150),CSize(100,25)),

                        this, IDC_BTN_CLEAR);

            lsbResults.Create(WS_CHILD|WS_VISIBLE|WS_BORDER|LBS_NOTIFY|WS_VSCROLL,

                                       CRect(CPoint(10,205),CSize(300,120)),

                                                                                                                      this, IDC_LSB_RESULTS);

            statusbar.Create(WS_CHILD|WS_VISIBLE,

                                       CRect(1,2,3,4), this, IDC_SB);

            int RtEdges[] = {350};

            statusbar.SetParts(1,RtEdges);

}

void CMyMainWindow::OnPaint()

{

            CPaintDC dc(this);

            dc.TextOut(10, 185,_T("settlement                 Interest                 capital"));

}

void CMyMainWindow::OnRateFocus()

{

            edtAnnualRate.SetWindowText(_T(""));

}

void CMyMainWindow::OnAmountFocus()

{

            edtAmount.SetWindowText(_T(""));

}

void CMyMainWindow::OnRateKillFocus()

{

            CString str;

            // quand le control perd le focus, on verifie que

            // la valeur rentree est bien > 0.

            // un message est affiche sinon

            edtAnnualRate.GetWindowText(str);

            if ( _wtof(str) < 0 )

            {

                        MessageBox(_T("Invalide Interest Rate. Should be positive"));

                        edtAnnualRate.SetFocus();

            }

}

void CMyMainWindow::OnClickClear()

{

            // vide la list box

            lsbResults.ResetContent();

}

void CMyMainWindow::OnAmountKillFocus()

{

            CString str;

            // quand le control pred le focus, on verifie que

            // la valeur rentrée est un nombre et est > 0

            // un message est affiché sinon

            edtAmount.GetWindowText(str);

            if ( !(_wtof(str) != 0.0 && _wtof(str) > 0) )

            {

                        MessageBox(_T("Invalide Amount. Should be a positive number"));

                        edtAmount.SetFocus();

            }

}

void CMyMainWindow::OnClickCompute()

{

            lsbResults.ResetContent();

            CString str;    

            edtAnnualRate.GetWindowText(str);

            double rate = _wtof(str);

            switch ( GetCheckedRadioButton(IDC_BTNOPT_BIANNUAL, IDC_BTNOPT_MONTHLY) )

            {

            case IDC_BTNOPT_BIANNUAL:

                        rate = rate / 2;

                        break;

            case IDC_BTNOPT_QUATERLY:

                        rate = rate / 3;

                        break;

            case IDC_BTNOPT_MONTHLY:

                        rate = rate / 12;

                        break;

            default:

                        break;

            }

            edtAmount.GetWindowText(str);

            double amount = _wtof(str);

            double interest;

            for (int i = 1; i <= 100; ++i)

            {

                        interest = rate*amount;

                        amount = amount + interest;

                        str.Format(_T(" %5d   %24.3f %24.3f"),

                                            i, interest, amount);

                        // on ajoute une ligne a la list box

                        lsbResults.AddString(str);

            }

}

// quand l'utilisateur double-clique sur une ligne

// dans la liste, la ligne s'affiche dans la

// bar de status

void CMyMainWindow::OnDblClickResults()

{

            int index;

            CString s, SelStr;

            index = lsbResults.GetCurSel();

            lsbResults.GetText(index,SelStr);

            SelStr.TrimLeft();

            s.Format(_T("pos: %d, entry: %s"), index + 1, SelStr);

            statusbar.SetText(s,0,0);

}