c++ - 如何在C++中从字符串ID中提取int日，月和年

我从大学开始做这个程序，但是我还有一些在家做的功能:getBirthday和age。如何从字符串ID中获取日，月，年的整数值？

我试过仅使用字符串，但不起作用。

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

enum Sex {male,female,unknown};  //const
class Person   //class
{
private:
    string name;
    string ID;   //this is the problem
    Sex pol;
....
void getBirthday(int &day,int&month,int&year)  //even if i use string for day...it is not working
{}
...
int main()
{Person p1("ALEX","9510167954")...;}   //95-year,10-month,16-day*this is what my teacher wrote

我希望输出:16/10/95

最佳答案

尝试如下初始化getBirthday( )参数:

day = stoi(ID.substr(0,2));
month = stoi(ID.substr(2, 2));
year = stoi(ID.substr(4, 2));