在std :: for_each中调用std :: function

#include<algorithm>
#include<functional>
#include<iostream>
#include<vector>

int main() {
    std::vector<int> numbers = {1, 2, 3, 4, 5};

    // 定义一个std::function对象，用于存储要在std::for_each中调用的函数
    std::function<void(int)> print_number = [](int n) {
        std::cout << n << " ";
    };

    // 使用std::for_each算法和print_number函数对数字向量进行操作
    std::for_each(numbers.begin(), numbers.end(), print_number);

    return 0;
}

std::for_each(numbers.begin(), numbers.end(), [](int n) {
    std::cout << n << " ";
});