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  1. Prepare
  2. Tutorials
  3. 30 Days of Code
  4. Day 12: Inheritance
  5. Discussions

Day 12: Inheritance

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1174 Discussions

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  • uk_hamzath
     + 0 comments

    Java Solution:

    Student(String fname, String lname, int id, int[] score){
        super(fname, lname, id);
        this.testScores = score;
    }

    char calculate(){
        int sum = 0;
        for(int i=0; i<testScores.length; i++){
            sum = sum +testScores[i];
        }
        int avg = sum/testScores.length;
        if(avg >= 90){
            return 'O';
        }else if(avg >= 80){
            return 'E';
        }else if(avg >= 70){
            return 'A';
        }else if(avg >= 55){
            return 'P';
        }else if(avg >= 40){
            return 'D';
        }else{
            return 'T';
        }
    }

  • parsanaderi2004
     + 1 comment

    any advice on my code? can you make it better or even shorter?

    Student class implementation with Python:

    class Student(Person):
    def __init__(self, firstName, lastName, idNumber, scores):
        self.firstName = firstName
        self.lastName = lastName
        self.idNumber = idNumber
        self.scores = scores

    def calculate(self):
        sum = 0
        for score in self.scores:
            sum += score
        
        avg = sum / len(self.scores)
        if avg <= 100 and avg >= 90:
            return "O"
        elif avg < 90 and avg >= 80:
            return "E"
        elif avg < 80 and avg >= 70:
            return "A"
        elif avg < 70 and avg >= 55:
            return "P"
        elif avg < 55 and avg >= 40:
            return "D"
        else:
            return "T"

  • namnika_janband1
     + 0 comments

    javascript 

    class Student extends Person {
    /*	
    *   Class Constructor
    *   
    *   @param firstName - A string denoting the Person's first name.
    *   @param lastName - A string denoting the Person's last name.
    *   @param id - An integer denoting the Person's ID number.
    *   @param scores - An array of integers denoting the Person's test scores.
    */
    // Write your constructor here
    constructor(firstName, lastName, idNumber, testScores){
        super(firstName, lastName, idNumber)
        
        this.testScores = testScores
       
        
    }
    /*	
    *   Method Name: calculate
    *   @return A character denoting the grade.
    */
    // Write your method here
    
    calculate(){
         let avg = 0
         let sum = 0
        for(let i=0; i<this.testScores.length; i++){
             sum += this.testScores[i]
             avg  = sum / this.testScores.length
        }
        
        if(avg>=90 && avg <=100){
                return 'O'
                
            }else if(avg>=80 && avg<90){
                
                return 'E'
            }else if(avg>=70 && avg<80){
                
                return 'A'
            }else if(avg>=55 && avg<70){
                
                 return 'P'
            }else if(avg>=40 && avg<55){
                
                return 'D'
            }else if(avg<40){
                
                return 'T'
            }
        
    }
}

  • shreyavashistha1
     + 1 comment

    import java.util.*;

    class Person { protected String firstName; protected String lastName; protected int idNumber;

    // Constructor
Person(String firstName, String lastName, int identification){
    this.firstName = firstName;
    this.lastName = lastName;
    this.idNumber = identification;
}

// Print person data
public void printPerson(){
     System.out.println(
            "Name: " + lastName + ", " + firstName 
        +   "\nID: " + idNumber); 
}

    }

    class Student extends Person{ private int[] testScores;

    Student(String firstName,String lastName,int id,int[] testScores){
    super(firstName,lastName,id);
    this.testScores=testScores;
}

 public char calculate(){
    int sum=0;
    int n=testScores.length;
    for(int i=0;i<n;i++){
        sum += testScores[i];
    }
    float avg=sum/n;
    if(avg>=90&&avg<=100){
        return 'O';
    }
    else if(avg>=80){
        return 'E';
    }
    else if(avg>=70){
        return 'A';
     }
    else if(avg>=55){
        return 'P';
    }
    else if(avg>=40){
        return 'D';
    }
    else{
        return 'T';
    }
    //another method without using if-else 
    //return avg>89?'O':avg>79?'E':avg>69?'A':avg>54?'P':avg>39?'D':'T';
}

    }

    class Solution { public static void main(String[] args) { Scanner scan = new Scanner(System.in); String firstName = scan.next(); String lastName = scan.next(); int id = scan.nextInt(); int numScores = scan.nextInt(); int[] testScores = new int[numScores]; for(int i = 0; i < numScores; i++){ testScores[i] = scan.nextInt(); } scan.close();

        Student s = new Student(firstName, lastName, id, testScores);
    s.printPerson();
    System.out.println("Grade: " + s.calculate() );
}

    }

  • JanekPython09
     + 0 comments

    ****Python code*

    class Person:
	def __init__(self, firstName, lastName, idNumber):
		self.firstName = firstName
		self.lastName = lastName
		self.idNumber = idNumber
	def printPerson(self):
		print("Name:", self.lastName + ",", self.firstName)
		print("ID:", self.idNumber)

class Student(Person):
    #   Class Constructor
    #   
    #   Parameters:
    #   firstName - A string denoting the Person's first name.
    #   lastName - A string denoting the Person's last name.
    #   id - An integer denoting the Person's ID number.
    #   scores - An array of integers denoting the Person's test scores.
    #
    # Write your constructor here
    def __init__(self, firstName, lastName, idNumber, scores):
        super().__init__(firstName, lastName, idNumber)
        self.scores = scores
   
    def calculate(self):
        wynik2 = sum(self.scores) / len(self.scores)
        
        if 90 <= wynik2 and wynik2 <= 100:
            return "O"
        elif 80 <= wynik2 and wynik2 < 90:
            return "E"
        elif 70 <= wynik2 and wynik2 < 80:
            return "A"
        elif 55 <= wynik2 and wynik2 < 70:
            return "P"
        elif 40 <= wynik2 and wynik2 < 55:
            return "D"
        elif wynik2 < 40:
            return "T"
            

line = input().split()
firstName = line[0]
lastName = line[1]
idNum = line[2]
numScores = int(input()) # not needed for Python
scores = list( map(int, input().split()) )
s = Student(firstName, lastName, idNum, scores)
s.printPerson()
print("Grade:", s.calculate())