乘以浮点值“可能从双倍转换为浮点" [英] Multiplying float values "possible lossy conversion from double to float"

问题描述

我遇到了这个问题，我必须将公里数转换为英里数.我是一个新手程序员，请多多包涵.

I have this problem wherein I have to convert kilometers into miles. I'm a novice programmer so bear with me.

到目前为止，这是我的代码:

Here's my code so far:

import java.util.Scanner;

public class problem1 {
    public static void main (String args[]) {
        float m;
        float km;

        Scanner input=new Scanner(System.in);

        System.out.print("Please enter a distance in kilometers:");
        km=input.nextFloat();
        m=km*0.621371;
        System.out.println("This is equal to: "+m);
    }
}

这给我一个错误:

Incompatible types:possible lossy conversion from double to float.

推荐答案

您正在尝试将double设置为float变量

You are trying to set a double to a float variable

要修复，请更改此行

m=km*0.621371;

到

m=km*0.621371f;

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