Function Problem

[Firestone]

Hi, I'm new to C.
I wrote this as a function test, and I dont understand why it doesnt work...

#include <stdio.h>
int main(void)
{
	int a=2;
	int b=7;
	int Test(a,b);
	{
		return a+b;
	}
	printf("\n%d\n", Test(a,b));
	return 0;
}