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I'm having java troubles
Posted: Sat Dec 06, 2014 11:17 am
by Tea-Assault
Hey guys, I'm trying to learn java at the moment at university, and I have run into a slight issue with using for loops.
Basically I have to create this sequence "--***++++-----******+++++++" and this is what I have come up with so far:
I can get the sequence to read out this: 223334444555556666667777777
with this snippet of code
Code: Select all
int a, b;
for (a=2;a<8;++a)
{
for (b=1;b<a+1;++b)
{
System.out.print(a);
}
}
But I am struggling with trying to replace the numbers with the symbols. I think it might involve including conditional statements. I tried this but I think I may have gone wrong with the way I have decided to do it as it reads out this: ++***+++++++++******+++++++
Code: Select all
int a, b;
for (a=2;a<8;++a)
{
for (b=1;b<a+1;++b)
{
if (a%3==0)
{
System.out.print("*");
}
else
{
System.out.print("+");
}
}
}
any help would be great
Re: I'm having java troubles
Posted: Sat Dec 06, 2014 11:47 am
by A Docile Sloth
You just need to add in a condition for printing "-"
You have three different output so you need three parts of the if statement:
Code: Select all
if(a%3==0)
{
System.out.print("*");
}
else if(condition for printing -)
{
System.out.print("-");
}
else
{
System.out.print("*");
}
Re: I'm having java troubles
Posted: Sat Dec 06, 2014 12:03 pm
by Tea-Assault
Ah, thanks sloth! I added the other condition, now to find out what that condition is haha
Re: I'm having java troubles
Posted: Sat Dec 06, 2014 12:07 pm
by CrookedBarrel
Code: Select all
System.out.print("--***++++-----******+++++++");
Re: I'm having java troubles
Posted: Sat Dec 06, 2014 12:08 pm
by Necromancer
not sure what the problem is, seems like you got the idea.
Code: Select all
if ((a==2) || (a==5)) System.out.print("-");
and so on.
you can try to make it more "elegant" using different methods and/or mathematical properties of the numbers.
Code: Select all
if (a%3 == 0) System.out.print("*");
if (a%3 == 1) System.out.print("+");
if (a%3 == 2) System.out.print("-");
Re: I'm having java troubles
Posted: Sat Dec 06, 2014 12:40 pm
by Tea-Assault
So yeah I don't know if this is cheating exactly, but it gave me the right readout in the screen haha
Code: Select all
int a, b;
for (a=2;a<8;++a)
{
for (b=1;b<a+1;++b)
{
if (a%3==0)
{
System.out.print("*");
}
else if (((a%2==0)&&(a<4))||(a%5==0))
{
System.out.print("-");
}
else
{
System.out.print("+");
}
}
}
Could be on the same level as going "System.out.print("--***++++-----******+++++++") to try to answer the question..
Re: I'm having java troubles
Posted: Sat Dec 06, 2014 12:42 pm
by Tea-Assault
Oh necromancer you glorious bastard! I forgot that you could have more than one remainder!
I spent 6 hours in the library today trying to work out how to do this hahaha
EDIT: I am genuinely so happy right now