使用掃描器獲取“二元運算符'/'的錯誤操作數類型”錯誤:(

Question

import java.util.Scanner; public class PACE { public static void main(String[] args) { Scanner keyboard = new Scanner(System.in); int walkTime = 0; System.out.println("Enter Food: "); String food = keyboard.nextLine(); System.out.println("Enter calories: "); String calories = keyboard.nextLine(); walkTime = calories / 5.2; System.out.println("Your must walk: "+ walkTime +" minutes."); } }

Answer 1

Java 是一種強類型語言： calories是一個字符串，不能被分割為一個 integer。

要使卡路里為 integer，請使用以下方法：

int calories = keyboard.nextInt();

Answer 2

我必須將卡路里設為 int 並將 int 放在公式前面

     System.out.println("Enter calories: ");
     int calories = keyboard.nextInt();
     
     walkTime = (int)(calories / 5.2);