Need Help with simple Java Program

[lestat]

I am having trouble of thinking of good ways to do this program. Basically all I have to do is get an integer and print it out backwards. Is there a way to convert a int to a string? A sample output would work like this:

Please enter in a number: 12345

5 4 3 2 1

We don't even have to get it from the user, but I want to because its kind of crappy to have to change it every time you want to use a different number. The way they wanted us to do it was with modulus and division operations, which is alright, but is there another way anyone knows of?

Thankee

 

[Jumpem]

Save each digit as a single charcter into a stack and then pop each character out and print it.

For example, input is 12345

Here's the stack with characters in it, now just pop and print.

| |
| |
| 5 |
| 4 |
| 3 |
| 2 |
| 1 |

 

[Ameesh]

hint: using recursion will let you use the system stack

 

[GiLtY]

If you don't need to do any calculations with them, Jumpem's idea is good. Make a character/interger array with one number in each cell. Then use a for loop to count it backwards, should do the trick.

 

[eLiu]

you could input them into an array...then print out the array counting backwards...(easiest way imo)

but the stack idea is neat too

 

[Ameesh]

or you can do it something like this:


//asumming base 10 number system
//this should compile in java or c


int reverse(int input)
{
int temp = 0;
if( input == 0 )
return(0);
while( input != 0)
{
temp = (temp * 10) + (input % 10);
input = input /10;
}
return temp;
}

 

[Ameesh]

ohh i didnt account for negative numbers, make sure you do.

 

[rutchtkim]

Well this is how I would do it from a file.

void reverseList(BufferedReader br) throws IOException{
String s=br.readLine();
if(s==null)return;
reverseList9br);
S.O.P(s);
}

thanks for the hint ameesh