The code is supposed to prompt the user to enter a studentID and if it is in the records then it will be removed, but instead it just prompts me to enter and when i enter the ID, it does not remove the ID (I display the data again after I supposedly removed it but it is still there) and just returns back to the menu. What can I do to correct it?
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void removeStudent()
{
System.out.print("\n Enter StudentID to remove: ");
long id =sc.nextLong();
int pos = searchStudentID(id);
if(pos == -1)
System.out.println("\n ERROR: No student found having same ID: " + id);
else
courses.remove(pos);
}
int searchStudentID(long studentID)
{
for(int c = 0; c < students.size(); c++)
if(studentID == students.get(c).getId())
return c;
return -1;
}
The code is supposed to prompt the user to enter a studentID and if it is in the records then it will be removed, but instead it just prompts me to enter and when i enter the ID, it does not remove the ID (I display the data again after I supposedly removed it but it is still there) and just returns back to the menu. What can I do to correct it?
Step by step
Solved in 2 steps
- void removeStudent(){System.out.print("\n Enter StudentID to remove: ");long id =sc.nextLong();int pos = searchStudentID(id);if(pos == -1)System.out.println("\n ERROR: No student found having same ID: " + id);elsecourses.remove(pos);} int searchStudentID(long studentID){for(int c = 0; c < students.size(); c++)if(studentID == students.get(c).getId())return c;return -1;} The code is supposed to prompt the user to enter a studentID and if it is in the records then it will be removed, but instead it just prompts me to enter and when i enter the ID, it just exits and goes back to the menu. is there something wrong with my code?function loginValidate () { var id = document.getElementById ('myid').value; var pass = document.getElementById('mypassword').value; if ((id == null : id alert ("ID and Pasword both must be filled out") : "") && (pass == null , pass == ")){ == return false: else if (id == null || id == "") { alert ("ID must be filled out "); return false; else if (pass == null || pass == "") { alert ("Password must be filled out "); return false;function removeErrMsgs() { var errMessages = document.getElementsByClassName('msg');for (let msg of errMessages) {msg.innerHTML = "";}}function validateValues() {var toBeReturned = true;removeErrMsgs();var fname = document.getElementById("fname").value;if (fname.length > 30) {document.getElementsByClassName('msg')[0].innerHTML = "First name can not be longer than 30 characters";toBeReturned = false;} var lname = document.getElementById("lname").value;if (lname.length > 30) {document.getElementsByClassName('msg')[1].innerHTML = "Last name can not be longer than 30 characters";toBeReturned = false;} var phone = document.getElementById('num').value;if (phone.length > 8) {document.getElementsByClassName('msg')[2].innerHTML = "Phone number can not be greater than 8 numbers";toBeReturned = false;} var items = document.getElementById('items').value;if (items > 4 || items < 2) {document.getElementsByClassName('msg')[3].innerHTML = "Item numbers should be between 1 and…
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- Implement all the classes using Java programming language from the given UML Class diagram. Note: This problem requires you to submit just two classes: Customer.java, Account.java. Do NOT include "public static void main()" method inside all of these classes. Graders will be testing your classes, using the unit-testing framework JUnit 4. Customer - ID:int -name:String -gender:char 'm' or 'f' +Customer(ID:int,name:String, discount:int) +getID():int +getName ():String +getGender ():char +toString():String "name (ID)" The Customer class models, customer design as shown in the class diagram. Write the codes for the Customer class and a test driver to test all the public methods. Account6: opposites = {'up': 'down', 'right': 'wrong', 'true': 'false'} alias opposites = print(alias is opposites) alias ['right'] = 'left' print (opposites ['right']) 7: What is printed by the following statements? matrix = {(0, 3): 1, (2, 1): 2, (4, 3): 3} print (matrix.get((0,3))) print (matrix.get((1, 3), 0)) 8: What is printed by the following statements? a = set(range (3,10)) b = set (range (6,15)) print (a - b) print (a^ b) 9: What is printed by the following statements? alist = [4,2,8,6,5] blist = [num*2 for num in alist if num%2==1] print (blist) 10: What is printed by the following statements? g = lambda x: X*X*X print (g(7))struct insert_into_hash_table { // Function takes a constant Book as a parameter, inserts that book indexed by // the book's ISBN into a hash table, and returns nothing. void operator()(const Book& book) { ///// /// TO-DO (8) ||||. // Write the lines of code to insert the key (book's ISBN) and value // ("book") pair into "my_hash_table". /// END-TO-DO (8) // } std::unordered_map& my_hash_table; };
- Why does a Random object's intended seed value correspond to the system time?Here is a statement: class temporary { public: void set(string, double, double); void print(); double manipulate(); void get(string&, double&, double&); void setDescription(string); void setFirst(double); void setSecond(double); string getDescription() const; double getFirst()const; double getSecond()const; temporary(string = "", double = 0.0, double = 0.0); private: string description; double first; double second; }; How can I write a definition of the member function manipulate that returns a decimal number as follows: If the value of description is "rectangle", it returns first * second; if the value of description is "circle", it returns the area of the circle with radius first; if the value of description is "sphere", it returns the volume of the sphere with radius first; if the value of description is "cylinder", it returns the volume of the cylinder with radius first and height second; otherwise, it returns the value -1.class temporary { public: void set(string, double, double); void print(); double manipulate(); void get(string&, double&, double&); void setDescription(string); void setFirst(double); void setSecond(double); string getDescription() const; double getFirst()const; double getSecond()const; temporary(string = "", double = 0.0, double = 0.0); private: string description; double first; double second; }; I need help writing the definition of the member function set so the instance varialbes are set according to the parameters. I also need help in writing the definition of the member function manipulation that returns a decimal with: the value of the description as "rectangle", returns first * second; if the value of description is "circle", it returns the area of the circle with radius first; if the value of the description is "cylinder", it returns the volume of the cylinder with radius first and height second; otherwise, it returns with the value -1.