How do I get a type(keyword) in a function?

[make026]

Hello all!

How do I get a type(keyword) in a function?

Here is my program:

#include <stdio.h>
#include <stdlib.h>
#include <typeinfo.h>

void test(??? datatype){ //How to do?
	printf("%s\n", typeid(datatype).name());
}

int main(){
	test(int);

	system("pause");
	return 0;
}

[Peter87]

You can use templates to pass types

#include <stdio.h>
#include <stdlib.h>
#include <typeinfo>

template<typename T>
void test(){
	printf("%s\n", typeid(T).name());
}

int main(){
	test<int>();
}

[LB]

Templates.
http://www.cplusplus.com/doc/tutorial/templates/

Or, you could pass the typeid if you want to do it at runtime. ;)

[make026]

Thank for your replies, Peter87 and L B!!!

Is that possible to pass a type as a parameter in a function?

test(int);

It is just like...

sizeof(int);

[Peter87]

No it's not possible. sizeof is an operator and not a function.

[firedraco]

No, that's what templates are for:

func<int>();
func<double>();
//etc 

sizeof isn't a function, it's like return, just a keyword.
sizeof int;
is the same as
sizeof(int);

[make026]

Thank for your replies, Peter87 and firedraco !!!