Lowercase to Uppercase?

[jordan88]

Hello, I am having a "loss of precision error" every time I try to convert a lower case to an upper case. We are not allowed to use the touppercase and tolowercase method in the program. Any advice on how to go about doing this without the error would be appreciated, thank you.

if (c >= 'a' && c <= 'z' )
{
x = c - 32;
}



c is the number read in
x was declared at the top of the program

[jx2]

we need to see more of your code a specialy how you declared your variables
i am quite sure tou need to cast the values(tell the compiler that you know what you trying to do
e.g. if you want to change from float to int
[code=java]

int i = 0;
float f = 4.54;

i = (int)(f);
[/code]
i hope that helps
jx2

[jordan88]

public class P4
{
public static void main(String []args)
{
char x = ' ';
Scanner input = new Scanner(System. in);
System.out.prin tln("Please enter a sequence of characters.");
String a = input.nextLine( );
char c = a.charAt(0);

if(c >= 'a' && c <= 'z')
{
x = (char) c - 34;
}

I tried adding the (char) next to the variable c(input) and it did not work. I am not used to working with chars and when I did have to convert a lower case to an uppercase I would just use the method toupper, ect.

[jx2]

[CODE=java]

x = (char) c - 34;// remember about bracets what you trying to do in here
//is trying to convert char c into char.
// c is a char !!
// and later you substracting 34
// wich change it into number

//try something like this:

x = (char)(c-34);

[/CODE]
should help

[jordan88]

[CODE=java]

x = (char) c - 34;// remember about bracets what you trying to do in here
//is trying to convert char c into char.
// c is a char !!
// and later you substracting 34
// wich change it into number

//try something like this:

x = (char)(c-34);

[/CODE]
should help

worked like a charm, I wasnt aware that you could use it like that, appreciate your help.
thank you :D

[BigDaddyLH]

That 34 (or is it 32?) is mysterious. Why not write:
[CODE=Java]x = (char) (c - 'a' + 'A');[/CODE]

[jordan88]

That 34 (or is it 32?) is mysterious. Why not write:
[CODE=Java]x = (char) (c - 'a' + 'A');[/CODE]

It was actually 32, i changed it in my program to see if i made a mistake in other char tests. Thanks for the check though :) just started to program again so i forget all the checks sometimes.

[JosAH]

It was actually 32, i changed it in my program to see if i made a mistake in other char tests. Thanks for the check though :) just started to program again so i forget all the checks sometimes.

It has nothing to do with 'checks'; everytime you see a 'magic' number in a piece
of code other than -1, 0 or 1 (and I feel tempted to spit on -1) throw the code away
or let any scabby cat pee on it and forget it afterwards.

Nowadays programming languages allow you to define those magic monstrosities
as either a (defined) constant or final value; there is no excuse anymore for silly
literal values other than -1, 0 and 1 (and even -1 is close to the edge).

kind regards,

Jos

[BigDaddyLH]

Nowadays programming languages allow you to define those magic monstrosities
as either a (defined) constant or final value; there is no excuse anymore for silly
literal values other than -1, 0 and 1 (and even -1 is close to the edge).

Once when I was teaching, I told a student that he could improve his code if he replaced 10 (which was just an arbitrary array size) with a constant. When he handed in his code, I saw that he had...
[CODE=Java]
public static final int TEN = 10;
[/CODE]

[JosAH]

Once when I was teaching, I told a student that he could improve his code if he replaced 10 (which was just an arbitrary array size) with a constant. When he handed in his code, I saw that he had...
[CODE=Java]
public static final int TEN = 10;
[/CODE]

:-) I once saw this:

[code=java]
public interface Constants {
int contant00= 42; // I don't remember their values
... // and the list continued up to this:
int constant71= 54; // but I do remember there were 72 of them
}
[/code]

Seventy two constants with meaningless names; some people deserve to have
their head nailed to the floor and covered in smelly parrot droppings.

kind regards,

Jos