[benchz23]

i need to make a program that would display the figure as shown below. using a DO-WHILE structure and a method to implement the task.
a C++ program.

output:

0
0 2
0 2 4
0 2 4 6
0 2 4 6 8
0 2 4 6 8 10

this is my draft:

#include <stdio.h>
#include <iostream>
int main()
{

int i=0;
int x=7;

do
{
     i=i+1;
cout<<i;

while(i<=7 )
{
cout<<i;


system("pause");
return 0;
}

< do i need to make a 2 DO's? and 2 WHILE? how can i start this?

MOD EDIT: When posting code...USE CODE TAGS!!!

This post has been edited by JackOfAllTrades: 24 March 2011 - 08:20 AM

[codeprada]

A DO {} WHILE() loop is actually comprised of both do and while. You will need an outer loop and an inner loop. The inner loop will produce the columns and the outer loop the rows.

[benchz23]

so.. how can i start this one? should i need to declare two variables 1st? let say, int x=0,int y=7. ??

[codeprada]

Yes you would need 2 variables to hold the counters. Your code should follow this algorithm. Follow it and try to implement it.

Written straight from the head so bare with me.

initialize integers inner and outer both to zero and maximum to 10
while outer is less than or equal to ( maximum / 2 )
	set inner to 0
	while inner is less than maximum
		print inner
		add 2 to inner
	end loop
	increment outer by 1
end loop

This post has been edited by codeprada: 24 March 2011 - 08:42 AM

[EarthShaker]

This should work. I haven't run it though, so try it and let me know.

int main()
{

int i=10;
int x=2;
int y=0;

while (x <= i)
{
    y = 0;
    while ( y <= x)
    {
        cout << y << " ";
        y += 2;
    }
    cout <<endl;
    x += 2;
}



return 0;

[benchz23]

oh tnx. by d way, i don't really know how to input inner and outer loop. LOL. do i need to make two DO and two WHILE?

[codeprada]

benchz23, on 24 March 2011 - 12:21 PM, said:

oh tnx. by d way, i don't really know how to input inner and outer loop. LOL. do i need to make two DO and two WHILE?

Oh so you don't have the basic syntax down as yet...Have a look at these sites to learn C++
http://www.learncpp.com/
http://www.cplusplus.com/doc/tutorial/
http://www.howtoforg...us-step-by-step

This is the shell of what your code should look like.

int inner, outer = 0, maximum = 10;
do
{
   inner = 0;

   do {

      //code here

   }while( inner <= maximum );

   outer = outer + 1; //or outer++;

} while( outer <= (maximum / 2) );

[benchz23]

EarthShaker, on 24 March 2011 - 08:52 AM, said:

This should work. I haven't run it though, so try it and let me know.

int main()
{

int i=10;
int x=2;
int y=0;

while (x <= i)
{
    y = 0;
    while ( y <= x)
    {
        cout << y << " ";
        y += 2;
    }
    cout <<endl;
    x += 2;
}



return 0;

"its not working" theres a problem of cout<<y<<" "; and also to cout<<endl; and return 0;

[vividexstance]

did you include the proper header files at the beginning of the file? Like:

#include <iostream>
using namespace std;

You atleast need to have that, so you can do input/output to the console.

This post has been edited by vividexstance: 24 March 2011 - 09:51 AM

[benchz23]

PERFECT!!! thanks. my problem solved! woohoo! thank to you earthshaker and codeprada! i owe u one

oh.. wait a minute.. my case is need to solve using DO-WHILE structure but the one running is WHILE WHILE? I did not apply DO in my program. where i can insert my DO here?

[EarthShaker]

Can't you use your intelligence to add one or two do{} statements to the code i provided? if so, you better start reading your books more often.

[codeprada]

Lovely explanation of a do {} while() statement here
http://mathbits.com/...ing/dowhile.htm

That's as simple as it gets

[benchz23]

Still Its not running. I'm spending 10hours in my computer today reading all about DO-WHILE. still i'm stuck up of this DO code here.

[jimblumberg]

Please post your current code along with any error/warning messages you receive when you compile the code if any.

Jim

[benchz23]

this is my recent output same with my expected output.:
use this for DO-while structure:

0
0 2
0 2 4
0 2 4 6
0 2 4 6 8
0 2 4 6 8 10

heres my draft:

#include <<iostream.h>>
#include<<conio.h>>
#include<<stdio.h>>

using namespace std;
int main()

{

int i=10;
int x=2;
int y=0;
 
do
 {
    cout<<x <===what should i write here? DO code.. the statement? i tried many things but it doesn't work.
 }
while (x <= i)
{

    y = 0;
    while ( y <= x)

    {
        cout << y << " ";

        y += 2;
    }
    cout <<endl;
    x += 2;
}

return 0;