①值传递

②地址传递

#include <iostream>
#include <algorithm>
#include <string>
using namespace std;
struct stu
{
	int age;
	string name;
};
void printStu(stu a)
{
	cout << a.age << ' ' << a.name << endl;
}
void printstu(stu* p)
{
	cout << p->age << ' ' << p->name << endl;
}
int main()
{	
	stu x = { 22,"adele" };
	printStu(x);
	printstu(&x);

}