主页 / user-593202

Denis's questions

Martin Hope
Denis
Asked: 2024-06-17 21:24:04 +0800 CST
  • 5

我有一个事件函数，当释放鼠标时调用，当两个形状叠加时，它们应该被“合并”，并且应该在这个地方创建另一个形状。

void __fastcall TForm1::ShapeMouseUp(TObject *Sender, TMouseButton Button, TShiftState Shift, int X, int Y)
{
    TShape* shape = dynamic_cast<TShape*>(Sender);
    if (shape) {
        shape->Tag = 0;
        if (!Panel1->BoundsRect.Contains(shape->BoundsRect)) {
            shape->Left = TagFloat; 
            shape->Top = TagFloat2;
        }
        else {
            // Проверяем наложение на другие квадраты
            for (int i = 0; i < Panel1->ControlCount; ++i) {
                TShape* otherShape = dynamic_cast<TShape*>(Panel1->Controls[i]);
                if (otherShape && otherShape != shape) {
                    if (shape->BoundsRect.IntersectsWith(otherShape->BoundsRect)) {
                        //Application->MessageBox(L"Условие выполнилось", L"Тест");
                
                        int left = std::max(shape->Left, otherShape->Left);
                        int top = std::max(shape->Top, otherShape->Top);
                        int right = std::min(shape->Left + shape->Width, otherShape->Left + otherShape->Width);
                        int bottom = std::min(shape->Top + shape->Height, otherShape->Top + otherShape->Height);

                        int intersectionWidth = right - left;
                        int intersectionHeight = bottom - top;

                        if (intersectionWidth > 0 && intersectionHeight > 0 && intersectionWidth * intersectionHeight > 0.5 * shape->Width * shape->Height) {
                            
                            TShape* newShape = new TShape(Panel1);
                            newShape->Parent = Panel1;
                            newShape->Width = shape->Width;
                            newShape->Height = shape->Height;
                            newShape->Left = shape->Left;
                            newShape->Top = shape->Top;
                            newShape->Shape = stEllipse;
                            newShape->Brush->Color = clRed;
                            newShape->OnMouseDown = ShapeMouseDown;
                            newShape->OnMouseMove = ShapeMouseMove;
                            newShape->OnMouseUp = ShapeMouseUp;

                            Panel1->RemoveControl(shape);
                            Panel1->RemoveControl(otherShape);
                            delete shape;
                            delete otherShape;
                            break;
                        }
                    }
                }
            }
        }
    }
}

但问题恰恰是条件不满足

c++builder
Martin Hope
Denis
Asked: 2024-05-20 00:48:44 +0800 CST
  • 5

有这2个函数：

1.

#include <iostream>
int ReturnIntX(int x) {
    if (x == 1) {
        return x;
    }
}
int main()
{
    int a = 1;
    int b = ReturnIntX(a);
}
 

#include <iostream>
int ReturnInt1(int x) {
    if (x == 1) {
        return 1;
    }
}
int main()
{
    int a = 1;
    int b = ReturnInt1(a);
}

以前的启动/后台进程与此有什么关系吗？

我有兴趣知道什么会更快：返回传递的参数，还是文字值？毕竟，如果你想一想，变量x即使是空的，也可以有“权重”，如果它也有值，那么“权重”就会增加

PS：您能推荐一些用于自测试的库吗？

c++