Question

为什么一下那段代码中atoi出现未定义呢？速求答案

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)
{
switch(id)
{
case IDC_OK:
{
TCHAR str1[256];
TCHAR str2[256];
GetDlgItemText(hwnd,IDC_EDIT1,str1,sizeof(str1));
GetDlgItemText(hwnd,IDC_EDIT2,str2,sizeof(str2));
int i1=atoi(str1);
int i2=atoi(str2);
int i3=i1+i2;
TCHAR str3[256];
wsprintf(str3,"%i",i3);
SetDlgItemText(hwnd,IDC_EDIT3,str3);
break;
}
default:
break;
}
}

void Main_OnClose(HWND hwnd)
{
EndDialog(hwnd, 0);
}为什么atoi出现未定义？？？

Answer 1

使用atoi要包标准头文件<stdlib.h>
这样就可以用了,给分