作用:用const来防止误操作
eg:
#include<iostream>
#include<string>
using namespace std;
struct student
{
string name;
int age;
int score;
};
void printstudent(const student* stu)
{
//stu->age=100;//操作失败,因为加了const修饰
cout << "姓名:" << stu->name << " 年龄:" << stu->age << " 分数:" << stu->score << endl;
}
int main()
{
student stu = { "张",18,100 };
printstudent(&stu);
}