How to fix this sort()?

Greetings,
I am recieving this code but it doesn't make sense to me. Pls tell me how to fix it.

Code:

/*
*	Specification:	
*		Input:	
*			Input three integers from the keyboard.
*		Output:
*			Sort them into ascending order onto the screen.
*
**************************************************************************************/

#include <iostream>
#include <numeric>		
using namespace std;

int Sort3(int);

int int1, int2, int3;

int main()
{

	cout << "Input three integers: \n";

	cin >> int1 >> int2 >> int3;

	cout << " Integers have now been sort by ascending order. " << Sort3(int1, int3) << "\n";
	return 0;


}


int Sort3(int in1, int int2, int int3)
{

	Sort3(int1, int3);
	return 0;
}

Here is the errors:
error C2660: 'Sort3' : function does not take 2 parameters
C:\Program Files\Microsoft Visual Studio\MyProjects\test\testme.cpp(39) : error C2661: 'Sort3' : no overloaded function takes 2 parameters
Error executing cl.exe.

test.exe - 2 error(s), 0 warning(s)

your program makes no sense at all. you prototype Sort3() with one parameter, call it with two, and define it with three. and your Sort3() function doesnt contain any code that could be expected to, well um, sort three numbers, you know?

now you said you're recieving this code from someone? ask them what on earth they think they're doing.

now you said you're recieving this code from someone? ask them what on earth they think they're doing.

My sister would not appreciate me speaking to her that way. I'll try and fix it. Thanks for your input. I am still learning C++ and she's afraid to place her code here because of the sarcasim people say.

Anyways... thanks, MOI!

You know that by just calling a function sort() doesn't give it sorting abilities

And why did you #include <numeric>?