for_each用法示例

前言

由于偶然间发现for_each能使得避免使用for循环，大大简化了代码。这里简单记录下for_each的一个简单示例demo,方便温习。

示例demo

#include <iostream>
#include "vector"
#include "algorithm"

void myfunc1(int i)
{
    
    std::cout << i << " ";
}

int main() {
    
  
    std::vector<int> arr{
     3, 4, 2, 6, 5, 1 };

    std::cout << "based on for_each, print the vector\n";
    for_each(arr.begin(), arr.end(), myfunc1);
    std::cout << "\n";

    std::cout << "based on lambda, print the vector\n";
    for_each(arr.begin(), arr.end(), [](const auto &i){
    std::cout << i << " ";});

    return 0;
}