Structured binding

You can now initialize multiple variables with a return value with a really cool syntax, as shown in the following code sample:

#include <iostream>
#include <tuple>
using namespace std;

int main ( ) {

    tuple<string,int> student("Sriram", 10);
    auto [name, age] = student;

    cout << "\nName of the student is " << name << endl;
    cout << "Age of the student is " << age << endl;

    return 0;
}

In the preceding program, the code highlighted in bold is the structured binding feature introduced in C++17. Interestingly, we have not declared the string name and int age variables. These are deduced automatically by the C++ compiler as string and int, which makes the C++ syntax just like any modern programming language, without losing its performance and system programming benefits. 

The preceding code can be compiled and the output can be viewed with the following commands:

g++-7 main.cpp -std=c++17
./a.out

The output of the preceding program is as follows:

Name of the student is Sriram
Age of the student is 10