#include <iostream>
#include <typeinfo> // for typeid
using namespace std;

int main()
{
    auto v1 = 7;                       // v1 is type int
    auto mygrade ='a';                 // mygrade is type char
    auto pi = 31.4;                    // pi is type double
    auto cstring = "have a nice day";  // cstring is type pointer to const char
    auto ptr2char = &mygrade;          // ptr2char is type pointer to char
    auto z = "zebra"[0];               // z is type char

    cout << typeid(v1).name()  << endl;
    cout << typeid(mygrade).name()  << endl;
    cout << typeid(pi).name()  << endl;
    cout << typeid(cstring).name()  << endl;
    cout << typeid(ptr2char).name()  << endl;
    cout << typeid(z).name()  << endl;

    typedef decltype(7) myint;
    myint x;
    cout << typeid(x).name()  << endl;

    decltype(7) y;
    cout << typeid(y).name()  << endl;

    // Somewhat practical
    int array[3][4] = {{1,2,3,4},{5,6,7,8},{9,10,11,12}};
    cout << typeid(array).name() << endl;
    cout << typeid(array[1]).name() << endl;
    cout << typeid(*array).name() << endl;
    cout << typeid(&array).name() << endl;
}