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// 2.11.for.loop.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};

if (auto itr = std::find(vec.begin(), vec.end(), 3); itr != vec.end()) *itr = 4;

for (auto element : vec)

std::cout << element << std::endl; // read only

for (auto &element : vec) {

element += 1; // writeable

}

for (auto element : vec)

std::cout << element << std::endl; // read only

}