#define _CRT_SECURE_NO_WARNINGS #include<iostream> #include<fstream> #include<conio.h> using namespace std; const int maxx = 4; struct student {int idnum;char name[40];char sex;int age; }stu[maxx];//最多添加4個學(xué)生 void choice(); void dell(); void xiugai(); void baocun(); void display() {cout << "-----------------------學(xué)生管理菜單----------------------\n";cout << "1 添加學(xué)生" << " " << "2 刪除學(xué)生 3 查詢學(xué)生信息 4修改信息 5保存 6退出" << endl; } void init() {//初始化函數(shù)for (int i = 0; i < maxx; i++){stu[i].name[40] = '\0';stu[i].sex = '\0';stu[i].age = 0;} } void add() {int k = 0, j;for (int i = 0; i < maxx; i++){if (stu[i].sex == '\0') k++;}cout << "剩余" << k << "個記錄可以添加\n";cout << "請輸入你要添加的學(xué)生個數(shù);\n";cin >> j;if (j > k) {cout << "error number";cout << endl;display();choice();}elsefor (int i = 0; i < j; i++){for (int h = 0; h < maxx; h++) {if (stu[h].sex == '\0'){cout << "請輸入第" << i + 1 << "個學(xué)生學(xué)號 姓名 性別(用m表示男 w表示女）年齡" << endl;cin >> stu[h].idnum >> stu[h].name >> stu[h].sex >> stu[h].age;for (int g = 0; g < maxx; g++){if (stu[g].idnum == stu[h].idnum && g != h){cout << "該學(xué)號不能添加" << endl;display();}}if (stu[h].sex != 'w' && stu[h].sex != 'm'){stu[h].sex = '\0';cout << "性別輸入錯誤\n";display();}if (stu[h].age < 1 || stu[h].age >100){stu[h].sex = '\0';cout << "年齡輸入錯誤" << endl;}break;}}cout << "\n學(xué)生添加成功\n";}display();choice(); } void dell() {//刪除功能int id,count=0;cout << "您想刪除的學(xué)生學(xué)號:\n";cin >> id;for (int i = 0; i < maxx; i++){if (stu[i].idnum == id){count++;stu[i].idnum = -1;stu[i].name[40] = '\0';stu[i].sex = '\0';stu[i].age = 0;cout << "刪除成功" << endl;break;}}if (count == 0){cout << "該學(xué)號不存在\n";}display();choice(); }void inqui() {int id , count = 0;cout << "您想查詢的學(xué)生學(xué)號(輸入0查看所有學(xué)生）:\n";cin >> id;if (id == 0){for (int i = 0; i < maxx; i++){if (stu[i].sex != '\0')cout << stu[i].idnum << " " << stu[i].name << " " << stu[i].sex << " " << stu[i].age << " \n";}}else {for (int i = 0; i < maxx; i++){if (stu[i].idnum == id){count++;cout << stu[i].idnum << " " << stu[i].name << " " << stu[i].sex << " " << stu[i].age << " ";}}if (count == 0)cout << "不存在這個學(xué)號的學(xué)生！\n";}display();choice();}void xiugai(){int count = 0;cout << "您想修改的學(xué)生學(xué)號:\n";int id;cin >> id;int i;for (i = 0; i < maxx; i++){if (stu[i].idnum == id){count++;cout << "您要修改的學(xué)生信息:";cout << stu[i].idnum << " " << stu[i].name << " " << stu[i].sex << " " << stu[i].age << " \n";cout << "請重新輸入信息 按學(xué)號 姓名 性別 年齡輸入;\n";cin >> stu[i].idnum >> stu[i].name >> stu[i].sex >> stu[i].age;cout << "已經(jīng)修改";break;}}if (count == 0)cout << "該學(xué)號不存在!\n"; \display();choice();}void baocun(){FILE* mysfile = NULL;mysfile = fopen("ooo.txt", "r");for (int i = 0; i < maxx; i++) {fscanf(mysfile, "%d", &stu[i].idnum);fscanf(mysfile, "%s",stu[i].name);fscanf(mysfile, "%s", stu[i].sex);fscanf(mysfile, "%d", stu[i].age);}cout << "信息已經(jīng)保存\n";fclose(mysfile);display();choice();}void exit(){system("cls");exit(1);}void choice(){int a;cout << "請選擇功能:\n";cin >> a;if (a == 1 || a == 2 || a == 3 || a == 4){switch (a){case 1:add();case 2: dell(); break;case 3:inqui(); break;case 4:xiugai(); break;case 5:baocun(); break;case 6:exit(); break;default:cout << "輸入選擇有錯誤！\n";break;}}}int main(){init();display();choice();}

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