编程小白求助,想要设计一个界面,共有4个目标(暂定为方形),想按照四个不同频率在届面闪烁,但实际画图界面中只有一个目标出现,没有出现,求问是什么问题?
CClientDC dc(GetParent());
Draw1(dc);
Draw2(dc);
Draw3(dc);
Draw4(dc);
void CView::Draw1(CClientDC &dc)
{
int time1=500;
CBrush Brush_Black(RGB(0,0,0));
CBrush Brush_White(RGB(255,255,255));
int l = rc.left;
int t = rc.top;
int r = rc.right;
int b = rc.bottom;
int x11=l; int y11=t; int x12=b/4; int y12=b/4;*/
for(int i=0;2*time1*i<5000;i++)
{
dc.FillRect(CRect(x11,y11,x12,y12),&Brush_White);
MySleep(time1);
dc.FillRect(CRect(x11,y11,x12,y12),&Brush_Black);
MySleep(time1);
}
dc.FillRect(CRect(x11,y11,x12,y12),&Brush_Black);
MySleep(1000);
}