結構體的引用

// structurereference.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include "iostream"
using namespace std;

typedef struct str
{
	int val;
	int x;
	int y;
}pos;

void F(pos &ref)// &或*勻可實現val++，但直接p作實參時不能實現val++。
{
	ref.val ++;
}

int _tmain(int argc, _TCHAR* argv[])
{
	pos p;
	p.x = 0;
	p.y = 0;
	cin>>p.val;
	F(p);
	cout<<p.val;

	char c;
	cin>>c;
	return 0;
}

/* 結構體賦值：
	允許 pos p = {1, 2, 3};
	但不允許 pos p; p = {1, 2, 3};
*/