Question

我写了一个Java程序但是我收到了错误：

ArrayMain.java:13: error: cannot find symbol
            ar[c]=input.nextInt;
                       ^
  symbol:   variable nextInt
  location: variable input of type Scanner

代码：

import java.util.Scanner;
class ArrayMain
{
    public static void main(String[] args)
    {
        Scanner input=new Scanner(System.in);
        System.out.println("Enter the size:");
        int c=input.nextInt();
        int[] ar=new int[c];
        System.out.println("Enter Element");
        for(int i=0;i<c;i++)
        {
            ar[c]=input.nextInt;
        }

        array(ar,c);
    }
    public static void array(int[] ar,int c);
    {
        System.out.println("Elements in reverse order are");
        for(int i=c;i>0;i--);
        {
            System.out.println(ar[c-1]);
        }
    }
}

我该如何解决？

Answer 1

应该是

 ar[c]=input.nextInt();

并确保方法定义正确

public static void array(int[] ar,int c) {   //notice the removal of semicolon

Answer 2

ar[c] = input.nextInt;

这是错误的，正确的代码是：

ar[c] = input.nextInt();

Answer 3

你应该在i中放置索引c而不是ar[c]来循环每个输入元素

System.out.println("Enter Element");
    for(int i=0;i<c;i++)
    {
        ar[i]=input.nextInt();  //not input.nextInt
    }

方法array(int[] ar,int c)也有问题：

public static void array(int[] ar,int c) // method decleration shouldn't end with `;`
{
    System.out.println("Elements in reverse order are");
    // for loop mustn't end with ';' for(int i=c;i>0;i--);
    for(int i=c-1;i>=0;i--)  // start at last element index to the first element which index is i=0
    {
        System.out.println(ar[i]);   // loop over each element in reverse order
    }
}

Java编译错误：找不到符号

3 个答案: