C語言程式

#include "stdafx.h"#include <windows.h>#include <windowsx.h>#include "resource.h"#include "MainDlg.h"#include <stdlib.h>BOOL WINAPI Main_Proc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam){    switch(uMsg)    {        HANDLE_MSG(hWnd, WM_INITDIALOG, Main_OnInitDialog);        HANDLE_MSG(hWnd, WM_COMMAND, Main_OnCommand);HANDLE_MSG(hWnd,WM_CLOSE, Main_OnClose);    }    return FALSE;}BOOL Main_OnInitDialog(HWND hwnd, HWND hwndFocus, LPARAM lParam){    return TRUE;}void Main_OnCommand(HWND hwnd, int id, HWND hwndCtl, UINT codeNotify){if (IDC_CLOSE == id){Main_OnClose(hwnd);}if (IDC_BUTTON1 == id){TCHAR n1[64];GetWindowText(GetDlgItem(hwnd,IDC_EDIT1),n1,sizeof(n1));if (0 == strlen(n1)) //加數1是否為空白{MessageBox(hwnd,TEXT("加數1不可為空，請重新輸入！"),TEXT("警告"),MB_OK);return;}/*MessageBox(hwnd,n1,TEXT("1111"),MB_OK);*/TCHAR n2[64];GetWindowText(GetDlgItem(hwnd,IDC_EDIT2),n2,sizeof(n2));if (0 == strlen(n2)) //加數1是否為空白{MessageBox(hwnd,TEXT("加數2不可為空，請重新輸入！"),TEXT("警告"),MB_OK);return;}int d1=atoi(n1);int d2=atoi(n2);int ret=d1+d2;TCHAR j[128];wsprintf(j,"%i",ret);SetWindowText(GetDlgItem(hwnd,IDC_EDIT3),j);}}void Main_OnClose(HWND hwnd){    EndDialog(hwnd, 0);}