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