js矩阵相乘

function matrixMultiply(a, b) {
    let result = [];
    for (let i = 0; i < a.length; i++) {
        result[i] = [];
        for (let j = 0; j < b[0].length; j++) {
            let sum = 0;
            for (let k = 0; k < a[0].length; k++) {
                sum += a[i][k] * b[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(matrixMultiply(matrixA, matrixB)); // 输出: [[19, 22], [43, 50]]

function canMultiply(a, b) {
    return a[0].length === b.length;
}

if (canMultiply(matrixA, matrixB)) {
    console.log(matrixMultiply(matrixA, matrixB));
} else {
    console.log("矩阵维度不匹配，无法相乘");
}