学生信息录入.txt

//用"-"将信息分开，可以乱序录入，输入学生的姓名，学院，性别，年龄。
#include<iostream>
#include<vector>
#include <Windows.h>
#include <string>
#include<fstream>
using namespace std;
class stu
{
public:
	string age;
	string sex;
	string xueyuan;
	string name;
	void sex1(vector<string>::iterator it);
	void age1(vector<string>::iterator it);
	void name1(vector<string>::iterator it);
	void xueyuan1(vector<string>::iterator it);
};
void complete(string a,int b,int c,stu &s)//b是字符串第一个元素位置，c是'-'
{
	//姓名没什么特征，年龄占两个字节全为数字，性别占两个字节（有的汉字是两个字节有的是三个）
	//且汉字的编码为Unicode(vs2019)
	
	if (c - b == 2&&(a[b]<0||a[b]>127))
	{
		s.sex = a.substr(b, c - b);
	}
    else if (a[b]>='0' && a[b]  <= '9')s.age = a.substr(b, c - b);
	else if (a.substr(c-4,4)=="学院")s.xueyuan = a.substr(b, c -b);
	else
	{
		s.name = a.substr(b, c - b);
	}
}
void separate(string a,stu &s)
{
	int b = 0;
	for (int i = 0;; ++i)
	{
		if (a[i] == '-')
		{
			if (b == 0)
			{
				complete(a,b, i, s);
			}
			else
			{
				complete(a, b + 1, i, s);
			}
			b = i;
		}
		if (i == size(a))
		{
			complete(a, b + 1, i + 1, s);
			break;
		}
	}
}
void presentation(vector<stu>students, int a)
{
	cout << "----------------------------------------" << endl;
	cout << "姓名----年龄----性别----学院------------" << endl;
	cout << "----------------------------------------" << endl;
	for (int i = 0; i < a; ++i)
		cout << students[i].name << "\t" << students[i].age << "\t" <<
		students[i].sex << "\t" << students[i].xueyuan << endl;
}
void filein(fstream &file,stu s) 
{
	file << s.name << "\t" << s.age << "\t" <<
		s.sex << "\t" << s.xueyuan << endl;
}
int is_chinese(string str)
{
	int i;

	if (strlen(str) < 2) return 0;

	for (i = 0; i < strlen(str); i++)
	{
		if (str[i] < 161 || str[i] == 255) return 0;
		if (!(i % 2) && (str[i] < 176 || str[i] >= 248)) return 0;
	}

	return 1;
}
int main()
{
	vector<stu>students;
	string s;
	stu stus;
	fstream file("example.txt", ios::out);
	file << "----------------------------------------" << endl;
	file << "姓名----年龄----性别----学院------------" << endl;
	file << "----------------------------------------" << endl;
	while (getline(cin,s))
	{
		if (s == "exit")break;
		separate(s, stus);
		students.push_back({ stus.age,stus.sex,stus.xueyuan,stus.name });
		filein(file, stus);

	}
	presentation(students, size(students));
}