/*
	Use of default parameters 
	John Sterling
	CS1124
	Polytechnic University
*/

#include <iostream>
using namespace std;

// Note the "= 5" after the parameter name y.
// This allows us to call the function foo passing it either
// two arguments or just one argument.  When the second argument
// is omitted in a call to foo, then the parameter y will have
// the default value, which is specified here to be 5.
void foo(int x, int y = 5) {
	cout << "x = " << x << ", y = " << y << endl;
}

int main () {
	foo(17);
	foo(17, 0);
	return 0;
}

/*
// We could have achieved almost exactly the same effect by 
// defining foo twice.  One time we could define it as taking
// two parameters as in:
void foo(int x, int y) {
	cout << "x = " << x << ", y = " << y << endl;
}
// and the second time taking only one parameter, but adding  
// in a local variable y.
void foo(int x) {
	int y = 5;
	cout << "x = " << x << ", y = " << y << endl;
}
*/