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  1. Prepare
  2. Tutorials
  3. 30 Days of Code
  4. Day 4: Class vs. Instance
  5. Discussions

Day 4: Class vs. Instance

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1892 Discussions

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  • bmariscal
     + 0 comments

    I think my solution it's ok, a blank line is being printed at the end of execution but I'm not allowed to modify that code and because of that I think the outcome is a "wrong" answer, please let me know if you see something wrong with my solution

    process.stdin.resume();
process.stdin.setEncoding('ascii');

var input_stdin = "";
var input_stdin_array = "";
var input_currentline = 0;

process.stdin.on('data', function (data) {
    input_stdin += data;
});

process.stdin.on('end', function () {
    input_stdin_array = input_stdin.split("\n");
    main();    
});

function readLine() {
    return input_stdin_array[input_currentline++];
}
function Person(initialAge) {
  this.age = initialAge;
  if (this.age < 0) {
      this.age = 0;
      console.log("Age is not valid, setting age to 0.");
  }
    // Add some more code to run some checks on initialAge
    this.amIOld=function(){
            // Do some computations in here and print out the correct statement to the console
            if (this.age < 13) {
                console.log("You are young.");
            } else {
                if ( this.age < 18) {
                    console.log("You are teenager.");
                } else {
                    console.log("You are old.");
                }
            }
    };
   this.yearPasses=function(){
          // Increment the age of the person in here
          this.age++;
   };
}


function main() {

var T=parseInt(readLine());
for(i=0;i<T;i++){
    var age=parseInt(readLine());
    var p=new Person(age);
    p.amIOld();
    for(j=0;j<3;j++){
        p.yearPasses();
        
    }
    p.amIOld();
    console.log("");   
    }
}

  • maheshpdahake
     + 0 comments

    the code doesn't print the you are old statement what could be the reason` import java.io.; import java.util.;

    public class Person { private int age; 

    public Person(int initialAge) {
    // Add some more code to run some checks on initialAge

     if(initialAge>0){
          age=initialAge;


      }
      else{

        System.out.println("Age is not valid, setting age to 0.");
          this.age=0;
      }

}

public void amIOld() {
    // Write code determining if this person's age is old and print the correct statement:
      if(age<13)
      {
          System.out.println("You are young..");
      }
      else if(age>=13 && age<28)
      {
          System.out.println("You are a teenager..");
      }
      else if(age >=18)
      {
          System.out.println("You are old..");
    }

}

public void yearPasses() {
    // Increment this person's age.
      this.age=age++;
}


public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int T = sc.nextInt();
    for (int i = 0; i < T; i++) {
        int age = sc.nextInt();
        Person p = new Person(age);
        p.amIOld();
        for (int j = 0; j < 3; j++) {
            p.yearPasses();
        }
        p.amIOld();
        System.out.println();
    }
    sc.close();
}

    } `

  • kashiffarhan653
     + 0 comments
    import java.io.*;
import java.util.*;

public class Person {
    private int age;	
  
	public Person(int initialAge) {
  		// Add some more code to run some checks on initialAge
          
          if(initialAge>0){
              age=initialAge;
            //   System.out.print("Age is not valid, setting age to 0.");
            //   this.age=0;
              
          }
          else{
            //   this.age=initialAge;
            System.out.println("Age is not valid, setting age to 0.");
              this.age=0;
          }
	}

	public void amIOld() {
  		// Write code determining if this person's age is old and print the correct statement:
        // System.out.print(/*Insert correct print statement here*/);
        if(age<13 ){
            System.out.print("You are young.\n");
        }
        if(age>=13 && age<18){
            System.out.print("You are a teenager.\n");
        }
        if(age>=18){
            System.out.print("You are old.\n");
        }
	}

	public void yearPasses() {
  		// Increment this person's age.
          age++;
	}

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int T = sc.nextInt();
		for (int i = 0; i < T; i++) {
			int age = sc.nextInt();
			Person p = new Person(age);
			p.amIOld();
			for (int j = 0; j < 3; j++) {
				p.yearPasses();
			}
			p.amIOld();
			System.out.println();
        }
		sc.close();
    }
}

  • tkooger
     + 1 comment

    This is broken for Typescript!

  • salawuraola23
     + 0 comments

    Guys! this is my code what am i doing wrong? public class Solution {

    public static void main(String[] args) {
     Scanner sc = new Scanner(System.in);
int T = sc.nextInt();
for (int i = 0; i < T; i++) {
    int age = sc.nextInt();
    Person p = new Person();
    p.amIOld(age);
    for (int j = 0; j < 3; j++) {
        p.yearPasses();
    }
    p.amIOld();
    System.out.println();
}
sc.close();

    } /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution. */ public class Person { private int age;

      public Person(int initialAge){
      if (initialAge > 0) {
           this.age = age;
      } else if (initialAge < 0){
          this.age = 0;
          System.out.println("Age is not valid, settimg age to 0");
      }
  }

    public void yearPasses(){ age = age + 1; } public void amIOld() { if(age < 13) { System.out.println("You are young..");
    }

    else if(age >= 13 && age < 18) {
    System.out.println("You are a teenager");
} 
else {
    System.out.println("You are old..");
}

}
}