用java实现矩阵

发布于 2024-11-02 16:58:45 字数 339 浏览 1 评论 0原文

嗨，我尝试用java实现一个矩阵...我想编写一个方法，它的参数是矩阵的行和列，并且该方法生成矩阵。我写了这段代码，但它有错误......我的问题是什么？请帮我

public class Table {
int row ;
int column ;

Table (int rows , int columns ){
    row = rows;
    column = columns;
}

void makeTable(int row , int column){
    char[][] ;
    c.length = column ;
    c[0].length = row ;

}
}

原文

hi i try to implement a matrix by java ... i want to write a method that it's argument is the row and the column of matrix and the method make the matrix.
i write this code but it have error .... what is my problem? please help me

public class Table {
int row ;
int column ;

Table (int rows , int columns ){
    row = rows;
    column = columns;
}

void makeTable(int row , int column){
    char[][] ;
    c.length = column ;
    c[0].length = row ;

}
}

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提赋 2024-11-09 16:58:45

class Table {

    int row;
    int column;
    char[][] c;

    Table(int rows, int columns) {
        row = rows;
        column = columns;
        makeTable(rows, column);//calling initilizer method
    }

    private void makeTable(int row, int column) {
        c = new char[row][column];//initilizing c

    }
}

class Table {

    int row;
    int column;
    char[][] c;

    Table(int rows, int columns) {
        row = rows;
        column = columns;
        makeTable(rows, column);//calling initilizer method
    }

    private void makeTable(int row, int column) {
        c = new char[row][column];//initilizing c

    }
}

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献世佛 2024-11-09 16:58:45

您没有提供具体的错误，但以下是现有代码中的一些错误：

void makeTable(int row , int column){
    // the next line is invalid - needs a variable name for the declaration
    char[][] ;
    // array length is not set as below, but is set at definition time
    c.length = column ;
    c[0].length = row ;

}

在 Java 中定义多维数组的正确方法是：

char[][] c = new char[row][column];

您还可以声明一个包含参差不齐的行的数组，每个行都有不同的列长度（或在你的情况下也是一样的，但为什么要把事情复杂化呢？）如下：

char[][] c = new char[row][];
for(int i = 0; i < row; i++) {
    c[row] = new char[column];
}

You don't provide a specific error, but here are a few in your existing code:

void makeTable(int row , int column){
    // the next line is invalid - needs a variable name for the declaration
    char[][] ;
    // array length is not set as below, but is set at definition time
    c.length = column ;
    c[0].length = row ;

}

The correct way to define a multidimensional array in Java is:

char[][] c = new char[row][column];

You can also declare an array with ragged rows each of whom has a different column length (or the same, in your case, but why complicate things?) as follows:

char[][] c = new char[row][];
for(int i = 0; i < row; i++) {
    c[row] = new char[column];
}

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似最初 2024-11-09 16:58:45

您是否考虑过提供变量名称？或者甚至声明矩阵？

想象：

class Table {
char matrix[][];
public Table(int row, int column) {
    matrix=makeTable(row, column);
} 

char[][] makeTable(int row, int column) {
   return new char[row][column];
}
}

Have you considered providing variable names? Or even declaring the matrix?

Imagine:

class Table {
char matrix[][];
public Table(int row, int column) {
    matrix=makeTable(row, column);
} 

char[][] makeTable(int row, int column) {
   return new char[row][column];
}
}

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