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// 2.3.if.switch.cpp

// chapter 2 language usability

// modern cpp tutorial

// created by changkun at changkun.de

// https://github.com/changkun/modern-cpp-tutorial

#include <iostream>

#include <vector>

#include <algorithm>

int main() {

std::vector<int> vec = {1, 2, 3, 4};

// after c++17, can be simplefied by using `auto`

const std::vector<int>::iterator itr = std::find(vec.begin(), vec.end(), 2);

if (itr != vec.end()) {

*itr = 3;

}

if (const std::vector<int>::iterator itr = std::find(vec.begin(), vec.end(), 3);

itr != vec.end()) {

*itr = 4;

}

// should output: 1, 4, 3, 4. can be simplefied using `auto`

for (std::vector<int>::iterator element = vec.begin(); element != vec.end(); ++element)

std::cout << *element << std::endl;

}