B00012 C++算法库的sort()函数

这个程序介绍了sort()函数个各种用法。

源程序来自:std::sort - cppreference.com

程序如下:

#include <algorithm>
#include <functional>
#include <array>
#include <iostream>

int main()
{
    std::array<int, 10> s = {5, 7, 4, 2, 8, 6, 1, 9, 0, 3};

    // sort using the default operator<
    std::sort(s.begin(), s.end());
    for (int a : s) {
        std::cout << a << " ";
    }
    std::cout << '
';

    // sort using a standard library compare function object
    std::sort(s.begin(), s.end(), std::greater<int>());
    for (int a : s) {
        std::cout << a << " ";
    }
    std::cout << '
';

    // sort using a custom function object
    struct {
        bool operator()(int a, int b)
        {
            return a < b;
        }
    } customLess;
    std::sort(s.begin(), s.end(), customLess);
    for (int a : s) {
        std::cout << a << " ";
    }
    std::cout << '
';

    // sort using a lambda expression
    std::sort(s.begin(), s.end(), [](int a, int b) {
        return b < a;
    });
    for (int a : s) {
        std::cout << a << " ";
    }
    std::cout << '
';
}

程序运行结果如下:

0 1 2 3 4 5 6 7 8 9
9 8 7 6 5 4 3 2 1 0
0 1 2 3 4 5 6 7 8 9
9 8 7 6 5 4 3 2 1 0

原文地址:https://www.cnblogs.com/tigerisland/p/7564731.html