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 << '\n'; // 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 << '\n'; // 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 << '\n'; // 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 << '\n'; }
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