数组操作程序演示

function exercise1() {
    const array = new Array(10).fill(0).map(() => Math.floor(Math.random() * 100));
    console.log("一维数组:", array);

    const sum = array.reduce((a, b) => a + b, 0); // 求和
    const max = Math.max(...array); // 最大值
    const min = Math.min(...array); // 最小值

    console.log(`一维数组的和: ${sum}`);
    console.log(`一维数组的最大值: ${max}`);
    console.log(`一维数组的最小值: ${min}`);
}

function exercise2() {
    const array2D = Array(3).fill(0).map(() => Array(3).fill(0).map(() => Math.floor(Math.random() * 100)));
    console.log("二维数组:", array2D);

    const sum2D = array2D.reduce((a, row) => a + row.reduce((b, val) => b + val, 0), 0);
    const max2D = Math.max(...array2D.flat());
    const min2D = Math.min(...array2D.flat());

    console.log(`二维数组的和: ${sum2D}`);
    console.log(`二维数组的最大值: ${max2D}`);
    console.log(`二维数组的最小值: ${min2D}`);
}

function randomArray(size, min = 0, max = 100) {
    return Array(size).fill(0).map(() => Math.floor(Math.random() * (max - min + 1)) + min);
}

function calculateArrayStats(array) {
    const sum = array.reduce((a, b) => a + b, 0);
    const max = Math.max(...array);
    const min = Math.min(...array);
    return { sum, max, min };
}

function exercise3() {
    console.log("练习3：改进后的一维数组");
    const array1D = randomArray(10);
    console.log("一维数组:", array1D);
    const stats1D = calculateArrayStats(array1D);
    console.log(`一维数组的和: ${stats1D.sum}`);
    console.log(`一维数组的最大值: ${stats1D.max}`);
    console.log(`一维数组的最小值: ${stats1D.min}`);

    console.log("\n练习3：改进后的二维数组");
    const array2D = randomArray(3 * 3).reduce((acc, val, index) => {
        const row = Math.floor(index / 3);
        acc[row] = acc[row] || [];
        acc[row][index % 3] = val;
        return acc;
    }, []);
    console.log("二维数组:", array2D);
    const flatArray2D = array2D.flat();
    const stats2D = calculateArrayStats(flatArray2D);
    console.log(`二维数组的和: ${stats2D.sum}`);
    console.log(`二维数组的最大值: ${stats2D.max}`);
    console.log(`二维数组的最小值: ${stats2D.min}`);
}

exercise1();
exercise2();
exercise3();