华为od-整型数组按个位值排序

#include <iostream>

int getUnits(int num)
{
    return abs(num) % 10;
}
bool compare(int a, int b)
{
    return getUnits(a) < getUnits(b);
}

int main()
{
    std::vector<int> array {1,2,5,-21,22,11,55,-101,42,8,7,32};
    std::sort(array.begin(), array.end(), compare);
    for (int num : array)
    {
        std::cout << num << " ";
    }
}