Some C++ tests

Well, after a while of faffing about with other things, I thought I’d go through some of the new features of C++17 and just a quick play about I found some very interesting new features.

#include <cstdlib>
#include <iostream>
#include <string>
#include <vector>
#include <tuple>

using namespace std;

int main(int argc, char** argv) {
    vector<string> strings = {
        "Hello",
        "World",
        "This",
        "is",
        "the",
        "best",
        "I",
        "can",
        "do"
    };
    
    for (string str: strings) { // I now know
        cout << str << endl;
    }
    
    cout << strings.size() << endl;
    
    // https://www.geeksforgeeks.org/tuples-in-c/
    // makes it more interesting with tuple_cat
    
    auto mytuple1 = make_tuple("triangle1", 't', 10, 15, 20); // interesting...
    auto mytuple2 = make_tuple("triangle2", 'b', 1, 2, 3);
    cout << get<0>(mytuple1) << endl;
    mytuple1.swap(mytuple2);
    cout << get<0>(mytuple1) << endl;
    cout << tuple_size<decltype(mytuple1)>::value << endl;

    return 0;
}

First off the std<vector> initialisation can now be done as it is with Java, but more interestingly is the for loop which works with any class list. That makes life so much easier for C++ handling data.

The next bit was the tuples. For some reason I always associated tuples with a set of 3 items. But after this… This allows for a quick, and maybe dirty way, of avoiding setting up a new class to handle short bursts of data. Very simple.

Now I’m going to play around with some more C++17 features. I may end up moving completely back to C++ and away from Java again.

EDIT:

The output:

Hello
World
This
is
the
best
I
can
do
9
triangle1
triangle2
5

RUN FINISHED; exit value 0; real time: 0ms; user: 0ms; system: 0ms