how to write a program that gives greatest number and least number

[Danny Alphones]

this is what i did so far...any suggestions

import acm.program.*;

public class FindRange extends ConsoleProgram {
	int val1;
	int val2;
	int val3;
	int val4;
	int val5;
	int val6;
	int val7;
	public void run() {
		 val1 = readInt("enter val1: ");
		 val2 = readInt("enter val2: ");
		 val3 = readInt("enter val3: ");
		 val4 = readInt("enter val4: ");
		 val5 = readInt("enter val5: ");
		 val6 = readInt("enter val6: ");
		 val7 = readInt("enter val7: ");
		
		println(fnum());
		println(snum());
	}
	private int fnum(){
		if(val1>val2){
			return(val1);
		}else{
			return(val2);
		}
	}
	private int snum(){
		if(val3>fnum()){
			return(val3);
		}else{
			return(fnum());
		}
	}
}

[Jeanne Boyarsky]

Danny,
Have you learned about arrays or ArrayLists yet? If so, you can use a loop. Otherwise, you'll need to have 7 if statements (or call a method 7 times.)

[Danny Alphones]

can you either tell me where i can learn about arraylists or show me an example of how i could write 7 if statements (or call a method 7 times).

[Danny Alphones]

and can you also tell me if i am on the right track with the code that i posted earlier

[Henry Wong]

Danny Alphones wrote:can you either tell me where i can learn about arraylists or show me an example of how i could write 7 if statements (or call a method 7 times).

Tutorials on arrays... https://docs.oracle.com/javase/tutorial/java/nutsandbolts/arrays.html

Henry

[Danny Alphones]

thanks Henry Wong

[Danny Alphones]

Henry Wong how would i use an arraylists to get the greatest and least out of 7 numbers i did not really understand the concept.

[Jeanne Boyarsky]

I'm not Henry, but let's break it down. The first thing is to put all seven numbers in the ArrayList. Can you post how you do that?

Then you can rewrite the methods. To make the tasks simpler, can you write a method that takes an ArrayList parameter? How about one that returns the first element of the ArrayList?

[Danny Alphones]

i have never used arraylists ever so i do not know how to do even that.

[John Joe]

This is one of the example without ArrayList. You can look at it

public static void main(String[] args) {
    int smallest = 0;
    int large = 0;
    int num;
    System.out.println("enter the number");
    Scanner input = new Scanner(System.in);
    int n = input.nextInt();
    num = input.nextInt();
    smallest = num; 
 
    for (int i = 2; i < n; i++) {
        num = input.nextInt();
     
        if (num > large) {
            large = num;
        }
     
        if (num < smallest) {
            smallest = num;
        }
    }
    System.out.println("the largest is:" + large);
    System.out.println("Smallest no is : " + smallest);
}

[Danny Alphones]

so in my case i would do the same process but 7 times right

[John Joe]

Danny Alphones wrote:so in my case i would do the same process but 7 times right

From the code I given, the n used to represent how many process you want it to run

 

 System.out.println("enter the number");
    Scanner input = new Scanner(System.in);
    int n = input.nextInt();

[Danny Alphones]

Ok, thanks, and also i will send you my modified code later so you can check it:)

[John Joe]

Danny Alphones wrote:Ok, thanks, and also i will send you my modified code later so you can check it:)

No problem

[Danny Alphones]

this is my code but it only let me put 2 numbers

import acm.program.*;
import java.util.Scanner.*;
public class FindRange extends ConsoleProgram {
	public void run() {
		int Smallest = 0;
		int largest = 0;
		int num;
		int numb = 7;
		num = readInt("Enter the numbers: ");
		Smallest = num;
		
		for(int i = 7; i < numb; i++);{
			num = readInt("Enter the numbers: ");
			
			if(num>largest){
				largest = num;
			}
			if(num<Smallest){
				Smallest = num;
			}
		}
		println("the largest is:" + largest);
		println("the Smallest is: " + Smallest);
	}
	 
}

[Jeanne Boyarsky]

This is really close!

for(int i = 7; i < numb; i++);{

Since numb is 7, this is like writing:

for(int i = 7; i < 7; i++);{

Which means it should only loop once. What do you think would be good to set i to initially so it runs more than once?

[John Joe]

public static void main (String []args)
  {
      Scanner input = new Scanner(System.in);
        int Smallest = 0;
        int largest = 0;
        int num;
        
        System.out.print("Enter the process you want : ");
        num=input.nextInt();
        System.out.print("1 number : ");
        int numb=input.nextInt();
        Smallest = numb;
         
        for(int i = 1; i < num; i++){
            System.out.print((i+1)+" "+"number : ");
            numb = input.nextInt();
             
            if(numb>largest){
                largest = numb;
            }
            if(num<Smallest){
                Smallest = numb;
            }
        }
        System.out.println("the largest is:" + largest);
        System.out.println("the Smallest is: " + Smallest);
    }

The code not perfect yet. If user input 0 for the process, the result are wrong. But I leave it for you to modify  

[Danny Alphones]

7 sense i is repeating until it is more than 7

[Danny Alphones]

i dont think i can use the scanner because i am using a old version of eclipse and java so how would i do it other wise.  

[John Joe]

Danny Alphones wrote:i dont think i can use the scanner because i am using a old version of eclipse and java so how would i do it other wise.  

I never use the old version of eclipse and java

[Danny Alphones]

the only reason i am using an old version is that i am learning from online free lectures on the Stanford website and it requires an old version of the two.

[John Joe]

Danny Alphones wrote:the only reason i am using an old version is that i am learning from online free lectures on the Stanford website and it requires an old version of the two.

Why don't you follow the latest tutorial ?

[Danny Alphones]

because the latest tutorials are the intermediate ones not the beginner tutorials.(they were all recorded in the same year that is what i think at least but i am sure that there are no modern tutorials.)  

[Junilu Lacar]

Note also that OP's program is extending this ConsoleProgram

[Danny Alphones]

yeah i found out that i could use a scanner if i wrote java.util.U*; instead of java.util.Scanner;

[John Joe]

Danny Alphones wrote:yeah i found out that i could use a scanner if i wrote java.util.U*; instead of java.util.Scanner;

Glad to hear that  

[Campbell Ritchie]

Jeanne Boyarsky wrote:. . . it should only loop once. . . .

Are you quite sure about that? Please check carefully.

[Campbell Ritchie]

Danny Alphones wrote:i dont think i can use the scanner because i am using a old version of eclipse and java so how would i do it other wise.  

Scanner was introduced in 2004. Nobody ought to use a version of Java® so old that it doesn't have Scanner. If the tutorial you are using is old enough not to mention Scanner it shou‍ld not be used either.

[Campbell Ritchie]

Danny Alphones wrote:yeah i found out that i could use a scanner if i wrote java.util.U*; instead of java.util.Scanner;

That looks mistaken; I am pretty sure the first class name will fail to compile after import. Just because you can get away with imports ending * doesn't make them a good thing, anyway.

Anyway, if you are using Eclipse, then forget about imports and that sort of thing. You write something like
Sca ctrl-space and Eclipse will give you a dropdown list. That will have java.util.Scanner near its top, so you click (or maybe double‑click) Scanner and Eclipse will insert the import declaration for you in the correct place. You will not need to think about imports at all.
I think you have reached the stage where you need to resort to desperate measures.

1: Get rid of the Stanford package and use ordinary Java® like everybody else. We cannot test your code because we lack the requisite .jar.

2: Delete the entire class. I think you are going to have to start again.

3: Turn your computer off.

Your code looks as if you were guessing. You can make 1,000,000 guesses and as long as they are all different, there is a good chance that one will be correct. Or you can think about your application and plan it and get it to work first time.
You also need to be more careful what you are thinking about.

About 12 hours ago, you wrote:7 sense i is repeating until it is more than 7

That is incorrect. Look carefully at the operators.
Learn the basic form of a for loop, and work out what the different numbers on the left and in the middle shou‍ld be.

4: Write down on paper what you are going to do, and make the stages simpler and simpler. When you have got everything very simple, it will become easier to turn into code.

I believe your other threa‍d is so simlar to this one that I ought to merge the two.

[Campbell Ritchie]

I merged your stuff with the following thread. I hope that is okay by you.

[Danny Alphones]

when i run a java applet i am supposed to be able to put numbers and get both the greatest and the least(my class extends the ConsolProgram and i am learning from Stanford free online lectures)

here is my code....

import acm.program.*;
import java.util.*;
public class FindRange extends ConsoleProgram {
	public void run(){
	  
	      Scanner input = new Scanner(System.in);
	        int Smallest = 0;
	        int largest = 0;
	        int num;
	         
	        System.out.print("Enter the process you want : ");
	        num=input.nextInt();
	        System.out.print("1 number : ");
	        int numb=input.nextInt();
	        Smallest = numb;
	          
	        for(int i = 1; i < num; i++){
	            System.out.print((i+1)+" "+"number : ");
	            numb = input.nextInt();
	              
	            if(numb>largest){
	                largest = numb;
	            }
	            if(num<Smallest){
	                Smallest = numb;
	            }
	        }
	        System.out.println("the largest is:" + largest);
	        System.out.println("the Smallest is: " + Smallest);
	  }
   }