JAVA中取2维数组并输出1维数组

Question

我试图获取一个二维数组并通过一系列计算来运行它，以便将其转换为一维数组。但是，当我运行程序时，我不断收到这个长错误，

Exception in thread "main" java.lang.Error: Unresolved compilation problems: 
    Duplicate local variable raw_advisor
    Syntax error on token "i", delete this token
    Type mismatch: cannot convert from double to double[]
    Syntax error on token "i", delete this token
    Type mismatch: cannot convert from double to double[]
    Duplicate local variable advisor_score
    Syntax error on token "i", delete this token
    Type mismatch: cannot convert from double to double[]

    at Advisor_Score.main(Advisor_Score.java:16)

这是我的代码的样子：

import java.lang.Math;
public class Advisor_Score {
    public static void main(String[] args){ 
        double l[] = {1};
        double k[] = {2,2};
        double m[] = {3,3,3};
        double All_users[][]={l,k,m};
        double sum[]={0,0,0};
        double [] raw_advisor=new double [3];
        double [] advisor_scored_scaled= new double [3];
        double []advisor_score= new double [3];
        for (int i=0;i<All_users.length;i++){
                for(int j=0;j<All_users[i].length;j++){
                        sum[i]+=All_users[i][j];
                }
                double raw_advisor[i]=(sum[i]-(3*All_users[i].length))/4;
                double advisor_score_scaled[i]= 2.5*(1-Math.pow(Math.E, -.5*raw_advisor[i]));
                double advisor_score[i] = (2.5 + advisor_score_scaled[i]);
                System.out.println(advisor_score[i]);
                }       
    }
}

提前致谢！抱歉，我是编程新手。

Answer 1

在 for 循环内分配值时不能指定类型。在 Java 中，变量以特定类型定义一次。该类型以后无法在程序中更改，因此不需要指定它。您在定义 advisor_score_scaled 时也出现了拼写错误。试试这个：

import java.lang.Math;
public class Advisor_Score {
    public static void main(String[] args){ 
        double l[] = {1};
        double k[] = {2,2};
        double m[] = {3,3,3};
        double All_users[][]={l,k,m};
        double sum[]={0,0,0};
        double [] raw_advisor=new double [3];
        double [] advisor_score_scaled= new double [3];
        double []advisor_score= new double [3];
        for (int i=0;i<All_users.length;i++){
                for(int j=0;j<All_users[i].length;j++){
                        sum[i]+=All_users[i][j];
                }
                raw_advisor[i]=(sum[i]-(3*All_users[i].length))/4;
                advisor_score_scaled[i]= 2.5*(1-Math.pow(Math.E, -.5*raw_advisor[i]));
                advisor_score[i] = (2.5 + advisor_score_scaled[i]);
                System.out.println(advisor_score[i]);
                }       
    }
}

它为我编译并运行。当然不确定它是否给出了您想要的答案。