数组

数组的长度可以是变量；

int num[7] = {8,4,2,1,23,344,12 };
    double sum = 0;
    for (int i = 0; i < sizeof(num)/sizeof(num[0]); i++)
    {
        cout << num[i] << endl;
        sum += num[i];
    }
    cout << sum << endl;
    cout << sum/7 << endl;

//求数组最大值
    int max = nums[0];
    int numsLen = sizeof(nums) / sizeof(nums[0]);
    int maxIndex = 0;
    for (int i = 0; i < numsLen; i++)
    {
        if (nums[i] > max)
        {
            max = nums[i];
            maxIndex = i;
        }
    }
    cout << "该数组的最大值是：" << max << "
"
        << "最大值的索引是:" << maxIndex << endl;