node. JS run simple student Information management system

Const ReadLine = require (' Readline-sync ');
Student Information
let users = [{
Id:1,
Name: ' Liu ',
Age: ' 17 ',
Gender: ' Male ',
Score: ' 98 '

},
{
Id:2,
Name: ' Dog ',
Age: ' 18 ',
Gender: ' Male ',
Score: ' 81 '

},
{
Id:3,
Name: ' Xingxing ',
Age: ' 20 ',
Gender: ' Male ',
Score: ' 79 '

},
{
Id:4,
Name: ' Coco ',
Age: ' 16 ',
Gender: ' Female ',
Score: ' 73 '

},
{
Id:5,
Name: ' Along ',
Age: ' 15 ',
Gender: ' Female ',
Score: ' 66 '

}
];
account password
Let admin = [{
Username: ' 1 ',
Password: ' 1 '
}]
Login
function IsLogin (admin) {
Let num = 3;
while (true) {
Console.log (' Please enter account: ');
Let username = readline.question ();
Console.log (' Please enter password: ');
Let password = readline.question ();
for (Let i = 0; i < admin.length; i++) {
if (Admin[i].username = = Username && Admin[i].password = = password) {
Console.log (' login success ');
Notemenu ();
Return
}
}
num--;
if (num <= 0) {
Console.log (' Error 3 times, lock card ');
return num;
} else
Console.log (' Login failed, you have ${num} chance, please re-enter ');
}
}
Registered
function Isregister (admin) {
while (true) {
Console.log (' Please enter account: ');
Let username = readline.question ();
Console.log (' Please enter password: ');
Let password = readline.question ();
Let isOk = false;
for (Let i = 0; i < admin.length; i++) {
if (Admin[i].username = = username) {
Console.log (' User name is registered, please re-enter ');
IsOk = true;
Break
}
}
if (!isok) {
Admin.push ({
Username
Password
});
Console.log (' registered success ')
Menu (admin);
Return
}
}
}
Main Menu
Function Menu (Admin) {
while (true) {
Console.log (' 1. Login 2. Registration 3. Switch User ')
Console.log (' Please select the action to take: ')
Let option = readline.question ()-0;
Switch (option) {
Case 1:
Let num = islogin (admin);
if (num <= 0) {
Return
}
Break
Case 2:
Isregister (admin);
Break
Case 3:
IsLogin (admin);
Break
Default
Console.log (' Please enter the correct option ');
}
}
}
Action menu
function Notemenu () {
while (true) {
Console.log (' Select operation: 1.2. Add 3. Modify 4. Delete 5. Exit ')
Let option = readline.question ()-0;
Switch (option) {
Case 1:
Find ();
Break
Case 2:
AddUsers ();
Break
Case 3:
Change ();
Break
Case 4:
Deletsth ();
Break
Case 5:
Return
Default
Console.log (' Please enter the correct option ');

}
}

}
Inquire
function Find () {

Console.log (' Please input Query method: 1. Query all 2. Category Enquiry ');
Let option = readline.question ()-0;
Switch (option) {
Case 1:
FindAll ();
Break
Case 2:
Splitclass ();
Break
Default
Console.log (' Please enter the correct option ');
}
}
Query all
function FindAll () {
for (Let i = 0; i < users.length; i++) {
Console.log (Users[i]);
}
}
Search by Category
function Splitclass () {
Console.log (' Please select operation: 1. Name 2. Age 3. Gender 4. Score ');
Let option = readline.question ()-0;
Switch (option) {
Case 1:
Allname ();
Break
Case 2:
Userage ();
Break
Case 3:
Sex ();
Break
Case 4:
Scoreall ();
Break
Default
Console.log (' Please enter the correct option ');
}
}
Name Query
function Allname () {
Console.log (' Please enter the name to be queried ');
Let name = Readline.question ();
Let isOk = false;
for (Let i = 0; i < users.length; i++) {
if ((Users[i].name). Includes (name)) {
Console.log (Users[i]);
IsOk = true;
}
}
if (!isok) {
Console.log (' did not find the student ');

}
}
Age Enquiry
function Userage () {
while (true) {
Console.log (' Please enter the age to inquire ');
Let-age = readline.question ();
Let Reg =/^\d{1,3}$/;
Let isOk = false;
if (reg.test (age) = = True) {
for (Let i = 0; i < users.length; i++) {
if ((Users[i].age). Includes (age)) {
Console.log (Users[i]);
IsOk = true;
}
}
if (!isok) {
Console.log (' did not find students of that age ');
Return
} else
Return
} else {
Console.log (' Error, please enter the correct age ');

}
}
}
Gender search
function Sex () {
Console.log (' Please select the gender to be queried: 1. Male 2. Female ');
Let sel = readline.question ()-0;
Let mans =/^male$/,
Woman =/^female$/;
Switch (SEL) {
Case 1:
Sexsel (man);
Break
Case 2:
Sexsel (woman);
Break
}

}
Sex screening
function Sexsel (Sex) {
for (Let i = 0; i < users.length; i++) {
if (Sex.test (Users[i].gender)) {
Console.log (Users[i]);
}
}
}
Score Query
function Scoreall () {
Console.log (' Please enter a score to query ');
Let score = Readline.question ();
Let isOk = false;
for (Let i = 0; i < users.length; i++) {
if ((Users[i].score). Includes (score)) {
Console.log (Users[i]);
IsOk = true;
}
}
if (!isok) {
Console.log (' did not find students with this score ');

}
}
New
function AddUsers () {
while (true) {
Console.log (' Please enter new Student's name: ');
Let name = Readline.question ();
Console.log (' Please enter new Student Age: ');
Let-age = readline.question ();
Console.log (' Please enter new Student gender: ');
Let gender = readline.question ();
Console.log (' Please enter new Student score: ');
Let score = Readline.question ();
Let regname =/^[a-za-z]+$/; Restricted names can only be made up of letters
Let regage =/^\d{1,2}$/; Limit age can only be made up of numbers
Let Reggender =/^female|male$/; Restricted by male and female only
Let Regscore =/^ ((\d{1,2}) | ( 1[0-4]\D) | (150)) $/; Limit grades to only 0-150
if (regname.test (name)) {
if (Regage.test (age)) {
if (reggender.test (gender)) {
if (Regscore.test (score)) {
Users.push ({
ID: ' ${users.length+1} ',
Name
Age
Gender
Score
})
Console.log (' added successfully, the student information is as follows: ');
Console.log (Users.pop ());
Return
} else
Console.log (' score can only be in 0-150, please re-enter ');
} else
Console.log (' Sex can only be male or female, please re-enter ');
} else
Console.log (' Age can only be made up of numbers, please re-enter ');
} else
Console.log (' name can only consist of letters, please re-enter ');
}

}
//Modify
Function Change () {
Console.log (' Please enter the student number to be modified: ');
Let Stunum = readline.question ()-0;
for (l et i = 0; i < users.length; i++) {
if (users[i].id = = = Stunum) {
Console.log (' Current student information is as follows: ');
Console.log (Users[i]);
Changeall (i);
Return
}
}
Console.log (' Students without this number ');
}
//Modify Main Menu
Function Changeall (i) {
Console.log (' Select the information you want to modify: 1. Name 2. Age 3. Gender 4. Results ');
let option = Readline.question ()-0;
Switch (option) {
Case 1:
Stuname (i),
Break,
Case 2:
Stuage (i),
Break,
Case 3:
Stusex (i);
break;
Case 4:
Stuscore (i),
break,
Default:
Console.log (' Please enter the correct option ');
}
}
//Modify name
function Stuname (i) {
while (true) {
Console.log (' Enter name to modify: ');
Let name = Readline.question ();
Let Reg =/^[a-za-z]+$/;
if (reg.test (name) = = True) {
Users[i].name = name;
Console.log (' modified successfully! The student's information is as follows: ');
Console.log (Users[i]);
return;

} else
Console.log (' Please enter the correct name (letter) ');
}

}
Modify Age
function Stuage (i) {
while (true) {
Console.log (' Please enter the age to be modified: ');
Let-age = readline.question ();
Let Reg =/^\d{1,2}$/;
if (reg.test (age) = = True) {
Users[i].age = age;
Console.log (' modified successfully! The student's information is as follows: ');
Console.log (Users[i]);
Return
} else
Console.log (' Please enter the correct age number (1-2 digits) ');

}

}
Modify gender
function Stusex (i) {
while (true) {
Console.log (' Please enter the gender to be modified: ');
Let gender = readline.question ();
Let Reg =/^female|male$/;
if (reg.test (gender) = = True) {
Users[i].gender = gender;
Console.log (' modified successfully! The student's information is as follows: ');
Console.log (Users[i]);
Return
} else
Console.log (' Please enter the correct gender (male or Famel) ');
}

}
//Modify score
Function Stuscore (i) {
while (true) {
Console.log (' Please enter the score to be modified: ');
Let score = Readline.question ();
Let Reg =/^ ((\d{1,2}) | ( 1[0-4]\D) | (150)) $/;
if (reg.test (score) = = True) {
Users[i].score = score;
Console.log (' modified successfully! The student's information is as follows: ');
Console.log (Users[i]);
return;
} else
Console.log (' Please enter the correct score (0-150) ');
}
}
//delete
function Deletsth () {
while (true) {
Console.log (' Enter student number to delete: ');
Let Stunum = Readline.question ()-0;
Let Reg =/^\d+$/;
if (reg.test (stunum) = = True) {
for (let i = 0; i < users.length; i++) {
if (users[i].id = = = Stunum) {
Console.log (' Current student information is as follows: ');
Console.log (Users[i]);
Deletmenu (i);
return;
}
}
Console.log (' No students found ');
} else
Console.log (' Please enter the correct student number (number) ');
}

}
Delete Main Menu
function Deletmenu (i) {
Console.log (' Is it OK to delete: ');
Console.log (' 1. is 2. No ');
Let option = readline.question ()-0;
Switch (option) {
Case 1:
Delettrue (i);
Break

Case 2:
Return
}
}
OK delete
function Delettrue (i) {
Users.splice (i, 1);
Console.log (' Delete succeeded! ');
}
Menu (admin);

node. JS run simple student Information management system