1st simple step to understand and use tuple in C++

Tuple in C++ | Programming in C++:

Tuples are objects that pack elements of -heterogeneous types together in a single object. The object of Tuple can be returned from a function too. So, it helps to return multiple values from a function. Eventually, it helps us to avoid creating unnecessary structs.

std::tuple Objtuple { 22, 19.28, “text” };

The below example explains the following points:
1. Retrieve Elements from a std::tuple.
2. Getting Out Of Range value from the tuple.
3. Wrong typecast in case of getting value from the tuple.
4. Value from a tuple by dynamic index.

std::tuple RetunTuple()
{
// Creating a tuple of int, double and string.
std::tuple objtuple(7, 9.8, “text”);

    // Returning tuple object.
    return objtuple;

}

int main()
{

    //1.  Get tuple object from a function.
    std::tuple objTuple= RetunTuple();

    //2.  Get values from tuple.

    // First int value from tuple.
    int iVal = std::get < 0 > (objTuple);

    // Second double value from tuple.
    double dVal = std::get < 1 > (objTuple);

    // Third string value from tuple.
    std::string strVal = std::get < 2 > (objTuple);


    // 3. Index 4 cause compiler error- Invalid Index.
    //int iVal2 = std::get(objTuple); // Compile error


    //4. Wrong cast will force compile time error.
    //std::string strVal2 = std::get(objTuple); // Compile error



    int x = 1;
    //5. Integer x should be constant.
    //double dVal2 = std::get(objTuple); //Compiler Error


    const int i = 1;
    // Get second double value from tuple.
    double dVal3 = std::get < i > (objTuple);

    return 0;

}

tuple continuation: Use of make_tuple in C++.