在令牌“=”中键入语法错误，在此令牌之后期望表达式(矩阵乘法)

I'm trying to create a method produto to multiply matrices that will not be received by user input so I put a some matrices examples to test the code inside main. Right now I'm getting error "Syntax error on token "=", Expression expected after this token - line 15" Any help?

我正在尝试创建一个方法来将不会被用户输入的矩阵相乘，所以我用一些矩阵的例子来测试main里面的代码。现在，我正在获取错误“在令牌上的语法错误=”，在此令牌之后的表达式，第15行“有帮助吗?”

public class Mmul {

public static void main(String[] args) {

double[][] A={{1,2},{2,3}};
double[][] B={{1,2},{2,3}};
double[][] C={{0,0},{0,0}};
}
public void produto(double A[][], double B[][]){

    int m=A.length; // numero de linhas da matriz A
    int p=A[0].length; // numero de colunas da matriz A
    int n=B[0].length; // numero de colunas da matriz B
    double[][] C=[m][n];

    if (A.length == 0 || B.length == 0) {
        System.out.println("A matriz nao pode ser calculada.");
        return;
            if (B.length != p){
                System.out.println("A matriz nao pode ser calculada.");
                return;
            }

        for (int i=0; i<m; i++){
            for (int j=0; j<n; j++){

                for (int k=0; k<p; k++) {
                    C[i][j] += A[i][k]*B[k][j];
                }
                }

            }
            for (int i=0; i<C.length; i++){
                for (int j=0; j<C.length; j++){
                    System.out.printf("\t %d \t",C[i][j]);
                    System.out.println();

                }

            }


    } // fim da verificacao das matrizes

// codigo do metodo produto

}

}

2 个解决方案

#1

You need to assign to a type

您需要指定一个类型。

double[][] c = new double[m][n];

#2

should replace:

应该更换:

double[][] C=[m][n];

双C[][]=[m][n];

with

与

double[][] C=new double[m][n];

双C[][]= new双[m][n];

#1