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While loop

metalheadrenzo (23)
Can anyone help me in making a code that displays the integer 1 to 20 with only 4 numbers per line using only a while loop.

ex:
1234
5678 ...
etc..
R0mai (730)
metalheadrenzo (23)
How's this?

#include<stdio.h>
int main()
{
int num, count;
while (num<=20)
{
printf ("%d", count);
count++;
if(count % 4 == 0)
printf ("\n");
}

return 0;

}


that is all I could think of.
kevinchkin (450)
performing arithmetic operation on un(assigned|initialized) count. BIG MISTAKE.
metalheadrenzo (23)
oh right haha carelessness always get to me
metalheadrenzo (23)
damn it's still an infinite loop.
bluezor (298)
Did you initialise int num, count with an integer? (i.e. int num = 1;)
Last edited on
seecoder (2)
Hi guys, new to the forum and to c++, still learning myself

metalheadrenzo have you tried using a for loop inside the while loop to do the counting for you?

just a thought...
metalheadrenzo (23)
to blezor: yes I did. same with count yet I still get an infinite loop

and to seecoder: yeah I know it would have been much easier with a for loop but the instructions given was to use only a while loop.
bluezor (298)
Oh right.. look at your loop lol -

1
2
3
4
5
 
while (num <= 20) //look at the condition
{
     //now look thoroughly at what really happens inside the loop
    //.......
}


Pretty obvious once you look carefully xD

Tip: You don't need int num in your case, you can make the program work with just int count.
Last edited on
metalheadrenzo (23)
lol I got it.

Problem is I can't get it to form a 4 number per line out come :(

outcome is :

123
4567
891011
12131415
16171819
20

seecoder (2)
hint: (without giving you the direct answer)
using your code above, is there another way for you to test your (count % 4) result inside the if statement...

edit: that is to say, is there a slight modification to your formula in the area of (count % 4) that will give you the correct result (sorry, should have made myself clearer...)
Last edited on
bluezor (298)
Yep, following seecoder's hint, you only have to work on this line:

if (count % 4 == 0
metalheadrenzo (23)
can you elaborate on that hint please.

I'm fairly a beginner.
bluezor (298)
As in.. change it a bit.. work around it. Change the values a bit and experiment - it's good experience.

What happens if its 4 % 1? 4 % 2?
metalheadrenzo (23)
got it haha thanks
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