code

#include<iostream>
#include<fstream>//ofstream--只写、ifstream--只读、fstream--可读可写
#include<cstring>
#include<string>

using namespace std;

void ReadIn();
void SexJudge();
void MonJudge();
int PeopleNeeded(string);
void ChangeData();
void Addtudent();
void sort();

//定义结构体
struct stu {	//结构体大写的是一种新类型

	int id;//char[5]
	string name;
	string sex;
	string pro;
	int birthyear;
	int birthmon;
	int birthday;
	int st;
};

stu stus[40];//结构体
char a;
int ruler = 30;//实时的人数
int main()
{
	ReadIn();//读入文档
	int b = 1;
	while (b)//多次访问
	{
		cout << "目录：\n" << "(1)男女人数识别\n(2)11月份的出生人数\n";
		cout << "(3)身份查询 \n(4)修改生源地（宋羽玲）\n(5)输入新的学生信息\n";
		cout << "(6)按照出生日期排升序输出\n(7)结束进程\n(请输入数字)\n";
		int k;
		cin >> k;
		switch (k)
		{
		case 1:SexJudge();
			break;
		case 2:MonJudge();
			break;

		case 3:
		{cout << "你想搜索的名字是\n";
		string name1;
		cin >> name1;
		if (PeopleNeeded(name1) == 0) cout << "没有这个同学的信息\n";
		break; }

		case 4:ChangeData();
			break;
		case 5:Addtudent();
			break;
		case 6:
			sort();
			break;
		case 7: b = 0;
			break;
		}
	}
	cout << "感谢使用";
	return 0;
}

void ReadIn()//读入文档
{
	ifstream file;//配合头文件定义的文件对象

	file.open("C:/Users/童殿/Desktop/Rosetta‘s stone/大学/计算机/作业/期末大作业/student.txt", ios::in);//它建立了file和文件的关系
	
	if (!file) cout << "检查输入是否正确";//收留“/”
	for (int i = 0; i < ruler; i++)
	{
		file >> stus[i].id >> stus[i].name >> stus[i].sex >> stus[i].pro >> stus[i].birthyear >> a >> stus[i].birthmon >> a >> stus[i].birthday;

	}
	//子串对子串不能直接赋值
}

void SexJudge()
{
	int woman = 0, man = 0;
	for (int i = 0; i < ruler; i++)
	{
		if (stus[i].sex=="男")   man++;
		else woman++;
	}
	cout << "女生的数量是" << woman << "人" << endl << "男生的数量是" << man << "人" << endl;

}

void MonJudge()//11月生的有几人
{
	int mon = 0;
	for (int i = 0; i < ruler; i++)
	{
		if (stus[i].birthmon==11)   mon++;

	}
	cout << "11月份生的是" << mon << "人" << endl;

}


int PeopleNeeded(string name)
{
	int a = 0;
	for (int i = 0; i < ruler; i++)
	{
		if (stus[i].name == name)
		{
			cout << "姓名" << stus[i].name << "\t\t学号" << stus[i].id << "\t\t性别" << stus[i].sex << "\t\t省份" << stus[i].pro << "\t\t出生日期" << stus[i].birthyear << "/" << stus[i].birthmon << "/" << stus[i].birthday << endl;
			a++;
			break;
		}
	}
	return a;
}

void ChangeData()
{
	int k = -1;
	for (int i = 0; i < ruler; i++)
	{
		if (stus[i].name=="宋羽玲")
		{
			k = i;
			stus[i].pro = "江苏省";
			break;
		}
	}
	if (k == -1)
	{
		cout << "没有这个人";
		return;
	}
	fstream outfile("C:/Users/童殿/Desktop/Rosetta‘s stone/大学/计算机/作业/期末大作业/student.txt");
	
	for (int i = 0; i < ruler; i++)
	{	
	outfile << stus[i].id << '\t' << stus[i].name << '\t' << stus[i].sex << '\t' << stus[i].pro << "  \t" << stus[i].birthyear << a<< stus[i].birthmon << a << stus[i].birthday << endl;
	}
	outfile.close();
	cout << "已经将宋羽玲的省份改为" << stus[k].pro<<endl;
}

void Addtudent()
{
	stus[ruler].id = 1031;
	stus[ruler].name = "潘思辉";
	stus[ruler].sex = "男";
	stus[ruler].pro = "山东省";
	stus[ruler].birthyear = 2004;
	stus[ruler].birthmon = 7;
	stus[ruler].birthday = 15;
	ruler++;
}

void sort()//日期升序输出
{
	int arr[12][7];//相同月份排一横排
	int arrf[12]={0};//记录一桶里多少
	for (int i = 0; i < ruler; i++)
	{
		arr[stus[i].birthmon-1][arrf[stus[i].birthmon - 1]]=i;
		int t = arrf[stus[i].birthmon - 1];//i在排序后所在的实时位置
		for (int k = arrf[stus[i].birthmon - 1]-1; k >= 0; k--)
		{
			int f = arr[stus[i].birthmon - 1][k];
			if (stus[f].birthday >stus[i].birthday)//数据对调
			{
				int f = arr[stus[i].birthmon - 1][k];
                arr[stus[i].birthmon - 1][k] = i;
				arr[stus[i].birthmon - 1][t] = f;
				t = k;
			}
		}
		arrf[stus[i].birthmon - 1]++; 
	}

	for (int year = 2003; year <= 2004; year++)
	{
		for (int i = 0; i < 12; i++)
		{
			for (int j = 0; j < arrf[i]; j++)
			{
				if (stus[arr[i][j]].birthyear == year)
				{
					cout << stus[arr[i][j]].id << '\t' << stus[arr[i][j]].name << '\t' << stus[arr[i][j]].birthyear << "/" << stus[arr[i][j]].birthmon << "/" << stus[arr[i][j]].birthday << endl;
				}
			}
		}
	}

}