Question

我有这个函数，我想传递两个Vector3参数和一个int，所以我可以返回一个浮点值。即使我使用Vector3和int作为参数，我怎么能返回一个浮点值？这是我的代码：

//find other types of distances along with the basic one
public object  DistanceToNextPoint (Vector3 from, Vector3 to, int typeOfDistance)
{
    float distance;
    //this is used to find a normal distance
    if(typeOfDistance == 0)
    {
        distance = Vector3.Distance(from, to);
        return distance;
    }
    //This is mostly used when the cat is climbing the fence
    if(typeOfDistance == 1)
    {
       distance = Vector3.Distance(from, new Vector3(from.x, to.y, to.z));
    }
}

当我用“return”keyworkd替换“object”关键字时，它会给我这个错误; enter image description here

Answer 1

您的代码有两个问题。

如果要返回对象类型，则需要在使用之前将结果转换为float。
并非所有代码路径都返回值。

你可以试试这个：

/// <summary>
/// find other types of distances along with the basic one
/// </summary>
public float DistanceToNextPoint (Vector3 from, Vector3 to, int typeOfDistance)
{
    float distance;

    switch(typeOfDistance)
    {
        case 0:
             //this is used to find a normal distance
             distance = Vector3.Distance(from, to);
        break;
        case 1:
             //This is mostly used when the cat is climbing the fence
             distance = Vector3.Distance(from, new Vector3(from.x, to.y, to.z));
        break;
    }

   return distance;
}

更改包括：

返回float类型而不是object
确保所有代码路径都返回浮点类型
重新组织以使用开关

Answer 2

只需将返回类型从object更改为float，如下所示：

public object  DistanceToNextPoint(...)

要：

public float  DistanceToNextPoint(...)

然后在方法的最后一行返回变量distance：

public float DistanceToNextPoint(...){
    // ...
    return distance:
}

Answer 3

您应该将return类型object更改为float。

    //finde other tipe of distances along with the basic one
    public float DistanceToNextPoint (Vector3 from, Vector3 to, int tipeOfDistance)
    {
        float distance;
        //this is used to find a normal distance
        if(tipeOfDistance == 0)
        {
            distance = Vector3.Distance(from, to);
            return distance;
        }
        //This is mostly used when the cat is climbing the fence
        if(tipeOfDistance == 1)
        {
           distance = Vector3.Distance(from, new Vector3(from.x, to.y, to.z))
           return distance;
        }
    }

如何从具有不同类型参数的函数返回浮点数？

3 个答案: