순수 C++ 고계함수

#include <iostream>
#include <algorithm>
#include <vector>
#include <numeric>
 
 
int main() {
    
 
// transform in action
 
    
std::vector<int> v{ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
 
 
    std::transform(v.begin(), v.end(), v.begin(),
 
 
        [](int n) {return n + (n * 2); }
 
 
    );
 
 
    std::for_each(v.begin(), v.end(),
 
 
        [](const int&x) {std::cout << x << std::endl; });
 
 
 
// remove_if in action
 
 
    std::remove_if(v.begin(), v.end(),
 
 
        [](int n) {return n % 2 != 0; }
 
    );
 
 
    std::for_each(v.begin(), v.end(),
 
 
        [](const int&x) {std::cout << x << std::endl; });
 
 
 
// copy_if in action
 
 
    std::vector<int> v1;
 
 
    std::copy_if(v.begin(), v.end(),
 
 
        std::back_inserter(v1),
 
    
    [](int n) {return n % 2 != 0; }
 
    );
 
    std::for_each(v1.begin(), v1.end(),
 
 
        [](const int&y) {std::cout << y << std::endl; });
 
 
 
//accumulate in action
 
 
    std::vector<int> v2 = { 2, 9, -4, 2 };
 
 
    auto sum = std::accumulate(begin(v2), end(v2), 0);
 
 
    std::for_each(v2.begin(), v2.end(),
 
 
        [](const int&z) {std::cout << z << std::endl; });
 
}