C++: Check data type

[qingquan-li]

Reference:

• https://stackoverflow.com/questions/11310898/how-do-i-get-the-type-of-a-variable

#include <iostream>
#include <typeinfo>

using namespace std;

int main() {
    int an_int = 1;
    cout << typeid(an_int).name() << endl;         // i
    cout << typeid(-2).name() << endl;             // i
    cout << typeid(3.14).name() << endl;           // d
    cout << typeid('a').name() << endl;            // c
    cout << typeid("Hi").name() << endl;           // A3_c
    cout << typeid("Hello World!").name() << endl; // A13_c
    cout << typeid(true).name() << endl;           // b
    return 0;
}