找到两点之间的中点

Question

如何计算a点和b点之间的中点？我的代码会起作用吗？

struct Point
{
  int x;
  int y;    
};

Point midpoint(const Point& a, const Point& b)
{
    double middle = (a.x + b.x) / 2;
    return middle;
}

Answer 1

这应该有效：

Point midpoint(const Point& a, const Point& b) {
    Point ret;
    ret.x = (a.x + b.x) / 2;
    ret.y = (a.y + b.y) / 2;
    return ret;
}

Answer 2

如果中点返回一个Point，你为什么要返回一个双？

Answer 3

您需要返回

Point p;
p.x = (a.x+b.x)/2;
p.y = (a.y+b.y)/2;
return p;

Answer 4

Point midpoint(const Point& a, const Point& b)
{
    //double middle = (a.x + b.x) / 2;
    //return middle;
    Point middle;
    middle.x = (a.x + b.x) / 2;
    middle.y = (a.y + b.y) / 2;
    return middle;
}