第五章2.txt

本书在复习C++基础知识后

void CEx_RandIconDlg::OnTimer(UINT nIDEvent) 
{
	UINT nIDs[] = { IDI_ICON1, IDI_ICON2, IDI_ICON3 };
	srand((unsigned)time( NULL ));	// 启动随机种子
	// 获取小于3的随机数
	int nAindex = rand() % 3;
	int nBindex = rand() % 3;
	int nCindex = rand() % 3;

	HICON	hAicon	= AfxGetApp()->LoadIcon( nIDs[nAindex] );
	HICON	hBicon	= AfxGetApp()->LoadIcon( nIDs[nBindex] );
	HICON	hCicon	= AfxGetApp()->LoadIcon( nIDs[nCindex] );

	HICON	hAtemp	= m_wndIcon1.SetIcon( hAicon );
	::DestroyIcon( hAtemp );
	hAtemp	= m_wndIcon2.SetIcon( hBicon );
	::DestroyIcon( hAtemp );
	hAtemp	= m_wndIcon3.SetIcon( hCicon );
	::DestroyIcon( hAtemp );
		CDialog::OnTimer(nIDEvent);
}