14.c++ const修饰结构体

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

//定义学生结构体
struct Student {
	//定义成员列表

	string name;
	int age;
	int score;
};

//值传递
void printStudent1(struct Student s) {
	s.age = 100;
	cout << "子函数1中 姓名:" << s.name << "年龄:" << s.age << "分数:" << s.score << endl;
}


//地址传递 
void printStudent2(const Student *p) {
	//p->age = 200; //加入const后,一旦有修改的操作就会报错,可以防止误操作
	cout << "子函数2中 姓名:" << p->name << "年龄:" << p->age << "分数:" << p->score << endl;
}
int main() {

	struct Student s;
	s.name = "张三";
	s.age = 19;
	s.score = 90;


	printStudent1(s);
	printStudent2(&s);

	cout << "main函数中 姓名:" << s.name << "年龄:" << s.age << "分数:" << s.score << endl;
	system("pause");
	return 0;
}
  • 值传递 是将值复制一份
  • 地址传递不会复制而是直接用原数据,所有占用内存会少于值传递
posted @ 2025-07-05 16:46  little小新  阅读(18)  评论(0)    收藏  举报