Question

I am just trying to check whether compiler allows type name as variable name.
When i tried

int int;

It reported an error saying

error C2632: ‘int’ followed by ‘int’ is illegal

But when i tried

#include <string>
using namespace std;

int main()
{
    string string;
}

It didn’t give any error.
Both string and int are data types.

Why compiler allows string and doesn’t allow int ?

EDIT: includes updated.

EDIT: Some people are saying that int is not a class.
In that case, why below line is allowed.

int a(10);

it works similar to constructor of a class.

Answer 1

string is not a C++ reserved word, but int is, and a reserved word cannot be used as an identifier.

And its syntactically fine to have class name and object name to be same.

class test {}; 
int main() { 
        test test; // test is an object of type test.
}