Question

[ayoood]

If i have this statement
For example:
If x1 equal to 12 and x2 equal to 5, then y is 3
So i use (if else) statement ???
In this programme i want to make this things when i press x1 some value and x2 some value that give me the result that i put it in the (if else ststement)
I don’t want anybody make the programme just i need to know the statement that i need it in this programme and how it done

Thank you for your helping

[sukatoa]

I doubt about your statement....

Are you going to calculate first the two inputs?
and use it for comparison inside an if else statement?

or check the two inputs first? and try to search for a match pair?

could you post another detailed info about your algo?

[ayoood]

Im going to do project about wireless router
I will give x1 type of signal and x2 type of signal and y is the output .I have all the statement I have just to programmed it I need to know which statement that im going to use it that when I enter signal type for x1 and signal type of signal of x2 I get the right answer

[sukatoa]

If you can predict 99.99% the output by calculating the 2 input signals,

then you can use switch statement on it,
if statement is also applicable but it adds more lines of code..(for me)....

[ayoood]

I know i tired you with me a ask a lot of question but this is the last question could you show me how does that written

If x1 is excellent and x2 low then y is almost good

Sorry about that

[sukatoa]

If x1 is excellent and x2 low then y is almost good

if((x1==excellent)&&(x2<=low)){
     y="almost good";
}

[ayoood]

import java.io.*;

public class Class1
{

public static void main (String [] args) throws java.io.IOException
{
int y;
int x1;
int x2;
int excellent;
int low;
int poor;
int verygood;
int good;
int nosignal;

System.out.println("Please enter x1");
System.out.println("Please enter x2");

if((x1==excellent)&&(x2<=low)){
y = "almost good" ;
}else if ((x1==excellent)&&(x2<=poor)){
y = "poor" ;
}else if ((x1==excellent)&&(x2<=nosignal)){
y = "no signal" ;
}else if ((x1==verygood)&&(x2<=low)){
y = " good" ;
}else if ((x1==verygood)&&(x2<=poor)){
y = "low" ;
}else if ((x1==verygood)&&(x2<=nosignal)){
y = "poor" ;
}else if ((x1==good)&&(x2<=low)){
y = "almost low" ;
}else if ((x1==good)&&(x2<=poor)){
y = "almost good" ;
}else if ((x1==good)&&(x2<=nosignal)) {
y = "poor" ;
} else{
y = "no sgnal" ;
}
System.out.println("your type of signal is:");
}

}




Sorry about that bro I wrote it by myself be there are some of error so could you see what is the wrong with my code

Im really sorry about that

[sukatoa]

int excellent;
int low;
int poor;
int verygood;
int good;
int nosignal;

you may initialize first some values above.

System.out.println("Please enter x1");
System.out.println("Please enter x2");

You may read Scanner class for capturing inputs from keyboard... nextInt() method may fit your needs

System.out.println("your type of signal is:");

How about concat(String s) method?

eg. System.out.println("Signal type is".concat(y));

or System.out.println("Signal type is"+y);
or System.out.printf("Signal type is %s\n",y); C type

[ayoood]

i don’t know really what i do i try to solve the error but i couldn’t i read the file scanner class but i don’t know what i do with it I’m sorry about that i know it’s my wrong but i hope you to help me to overcome this problem i have only two days to submit the programme

[Eku]

Try changing the data type of variable y to

String y=null;

then out is:

System.out.println("your type of signal is: " + y);

[sukatoa]

Not using Scanner,

public class test{

	public static void main(String args[]) throws Exception{
		String y;
		int x1;
		int x2;
		int excellent = 100;
		int verygood = 75;
		int good = 50;
		int low = 20;
		int poor = 10;
		int nosignal = 0;

		System.out.println("Please enter x1"); 
		x1 = Integer.parseInt(String.valueOf((System.in.read(new byte[200]))));
		System.out.println("Please enter x2"); 
		x2 = Integer.parseInt(String.valueOf((System.in.read(new byte[200]))));

		if((x1==excellent)&&(x2<=low)){
			y = "almost good" ;
		}else if ((x1==excellent)&&(x2<=poor)){
			y = "poor" ;
		}else if ((x1==excellent)&&(x2<=nosignal)){
			y = "no signal" ;
		}else if ((x1==verygood)&&(x2<=low)){
			y = " good" ;
		}else if ((x1==verygood)&&(x2<=poor)){
			y = "low" ;
		}else if ((x1==verygood)&&(x2<=nosignal)){
			y = "poor" ;
		}else if ((x1==good)&&(x2<=low)){
			y = "almost low" ;
		}else if ((x1==good)&&(x2<=poor)){
			y = "almost good" ;
		}else if ((x1==good)&&(x2<=nosignal)) {
			y = "poor" ;
		} else{
			y = "no sgnal" ;
		}
	
		System.out.println("your type of signal is:" + y); 
	}
}

Using Scanner,

public class test{

	public static void main(String args[]) throws Exception{
		String y;
		int x1;
		int x2;
		int excellent = 100;
		int verygood = 75;
		int good = 50;
		int low = 20;
		int poor = 10;
		int nosignal = 0;

		System.out.println("Please enter x1"); 
		x1 = Integer.parseInt(keyInput());
		System.out.println("Please enter x2"); 
		x2 = Integer.parseInt(keyInput());

		if((x1==excellent)&&(x2<=low)){
			y = "almost good" ;
		}else if ((x1==excellent)&&(x2<=poor)){
			y = "poor" ;
		}else if ((x1==excellent)&&(x2<=nosignal)){
			y = "no signal" ;
		}else if ((x1==verygood)&&(x2<=low)){
			y = " good" ;
		}else if ((x1==verygood)&&(x2<=poor)){
			y = "low" ;
		}else if ((x1==verygood)&&(x2<=nosignal)){
			y = "poor" ;
		}else if ((x1==good)&&(x2<=low)){
			y = "almost low" ;
		}else if ((x1==good)&&(x2<=poor)){
			y = "almost good" ;
		}else if ((x1==good)&&(x2<=nosignal)) {
			y = "poor" ;
		} else{
			y = "no sgnal" ;
		}
	
		System.out.println("your type of signal is:" + y); 
	}

	private static final String keyInput(){
		return new java.util.Scanner(System.in).nextLine();
	}
}

Using Buffered IO

import java.io.BufferedReader;
import java.io.InputStreamReader;

public class test{

	public static void main(String args[]) throws Exception{
		String y;
		int x1;
		int x2;
		int excellent = 100;
		int verygood = 75;
		int good = 50;
		int low = 20;
		int poor = 10;
		int nosignal = 0;

		System.out.println("Please enter x1"); 
		x1 = Integer.parseInt(String.valueOf((keyInput())));
		System.out.println("Please enter x2"); 
		x2 = Integer.parseInt(String.valueOf(keyInput()));

		if((x1==excellent)&&(x2<=low)){
			y = "almost good" ;
		}else if ((x1==excellent)&&(x2<=poor)){
			y = "poor" ;
		}else if ((x1==excellent)&&(x2<=nosignal)){
			y = "no signal" ;
		}else if ((x1==verygood)&&(x2<=low)){
			y = " good" ;
		}else if ((x1==verygood)&&(x2<=poor)){
			y = "low" ;
		}else if ((x1==verygood)&&(x2<=nosignal)){
			y = "poor" ;
		}else if ((x1==good)&&(x2<=low)){
			y = "almost low" ;
		}else if ((x1==good)&&(x2<=poor)){
			y = "almost good" ;
		}else if ((x1==good)&&(x2<=nosignal)) {
			y = "poor" ;
		} else{
			y = "no sgnal" ;
		}
	
		System.out.println("your type of signal is:" + y); 
	}

	private static final String keyInput(){
		try{
			return new BufferedReader(new InputStreamReader(System.in)).readLine();
		}catch(Exception e){
			e.printStackTrace();
			return "0";
		}
	}
}

Try to test it, have some experiments on it....

[ayoood]

I am unable to express thank very much the word and a few in your right Thank You deserve more than this word all the programmes compile with me , you're really creative

Thank you very much again

[sukatoa]

You're welcome,

Eku's reply is the very important part, in post #7, i think you've stuck because you couldn't see any output....

next time, if you want to have an experiment, you may plan first on how you will display the output....
(that's the only evident you can use to decide whether it's correct or wrong).

[ayoood]

yes there are some of output i didn't get the right answer so what i should to do to get the right answer???

[Eranga]

What output you are expecting here.

[ayoood]

import java.io.BufferedReader;
import java.io.InputStreamReader;

public class test{

public static void main(String args[]) throws Exception{
String y=null;
int x1;
int x2;
int excellent = 100;
int verygood = 75;
int good = 50;
int low = 20;
int poor = 10;
int nosignal = 0;

System.out.println("Please enter x1");
x1 = Integer.parseInt(String.valueOf((keyInput())));
System.out.println("Please enter x2");
x2 = Integer.parseInt(String.valueOf(keyInput()));

if((x1==excellent)&&(x2<=low)){
y = "almost good" ;
}else if ((x1==excellent)&&(x2<=poor)){
y = "poor" ;
}else if ((x1==excellent)&&(x2<=nosignal)){
y = "no signal" ;
}else if ((x1==verygood)&&(x2<=low)){
y = " good" ;
}else if ((x1==verygood)&&(x2<=poor)){
y = "low" ;
}else if ((x1==verygood)&&(x2<=nosignal)){
y = "poor" ;
}else if ((x1==good)&&(x2<=low)){
y = "almost low" ;
}else if ((x1==good)&&(x2<=poor)){
y = "almost good" ;
}else if ((x1==good)&&(x2<=nosignal)) {
y = "poor" ;
} else{
y = "no sgnal" ;
}

System.out.println("your type of signal is:" + y);
}

private static final String keyInput(){
try{
return new BufferedReader(new InputStreamReader(System.in)).readLine();
}catch(Exception e){
e.printStackTrace();
return "0";
}
}
}
Try to test it, have s

[sukatoa]

try it,

import java.io.BufferedReader;
import java.io.InputStreamReader;

public class test{

public static void main(String args[]) throws Exception{
String y=null;
int x1;
int x2;
int excellent = 100;
int verygood = 75;
int good = 50;
int low = 20;
int poor = 10;
int nosignal = 0;

System.out.println("Please enter x1"); 
x1 = Integer.parseInt(String.valueOf((keyInput())));
System.out.println("Please enter x2"); 
x2 = Integer.parseInt(String.valueOf(keyInput()));

if((x1==excellent)&&(x2>poor)){
y = "almost good" ;
}else if ((x1==excellent)&&(x2==poor)&&(x2>nosignal)){
y = "poor" ;
}else if ((x1==excellent)&&(x2<=nosignal)){
y = "no signal" ;
}else if ((x1==verygood)&&(x2>poor)){
y = " good" ;
}else if ((x1==verygood)&&(x2==poor)&&(x2>nosignal)){
y = "low" ;
}else if ((x1==verygood)&&(x2<=nosignal)){
y = "poor" ;
}else if ((x1==good)&&(x2>poor)){
y = "almost low" ;
}else if ((x1==good)&&(x2==poor)&&(x2>nosignal)){
y = "almost good" ;
}else if ((x1==good)&&(x2<=nosignal)) {
y = "poor" ;
} else{
y = "no sgnal" ;
}

System.out.println("your type of signal is:" + y); 
}

private static final String keyInput(){
try{
return new BufferedReader(new InputStreamReader(System.in)).readLine();
}catch(Exception e){
e.printStackTrace();
return "0";
}
}
}