js代码实现矩阵相乘

function multiplyMatrices(matrixA, matrixB) {
    let result = [];
    let rowsA = matrixA.length;
    let colsA = matrixA[0].length;
    let colsB = matrixB[0].length;

    for (let i = 0; i < rowsA; i++) {
        result[i] = [];
        for (let j = 0; j < colsB; j++) {
            let sum = 0;
            for (let k = 0; k < colsA; k++) {
                sum += matrixA[i][k] * matrixB[k][j];
            }
            result[i][j] = sum;
        }
    }
    return result;
}

// 示例矩阵
let matrixA = [
    [1, 2],
    [3, 4]
];

let matrixB = [
    [5, 6],
    [7, 8]
];

console.log(multiplyMatrices(matrixA, matrixB)); // 输出: [[19, 22], [43, 50]]