Help me making a weird triangle ( this question never been on this forum)

[haniunited]

The users enters a number
which will spicify the number of rows and the value of the middle number

like
lets say the user entered the number '7'
the shape will be like this

 7                                 12 spaces from the left
                    6_7_6                             10 spaces from the left
                5_6_7_6_5                         8 spaces from the left
            4_5_6_7_6_5_4                     6 spaces from the left
        3_4_5_6_7_6_5_4_3                 4 spaces from the left
    2_3_4_5_6_7_6_5_4_3_2             2 spaces from the left
1_2_3_4_5_6_7_6_5_4_3_2_1         0 spaces from the left

Note: the symbol '_' means space

we must use 'for' functions three or two ones

[Harbinger]

So what - can't you make a loop which counts from 7 down to 1 ?

[haniunited]

is it shame that i dont know?

i just learned the 'for' tag myslef
i bought a book

i dont get it how to solve these questions they give

this was part of the question

if the number is even. we scan a number and print print this triangle

i solved the question i still need this part?
anyone can help ?

[Harbinger]

Well if
i = i + 1
count's forwards, do you imagine that
i = i - 1
might count backwards?

[haniunited]

look, my book is in spanish
am not good in english
need some help there

[hk_mp5kpdw]

One possible way to start off (assume user entered their input in a var called 'choice'):

int i;
for( i = 0; i < choice; ++i )
{
    /* You will need another loop (or two) in here to do the rest. 
       Start perhaps by printing out (6-i)*2 leading spaces using a
       loop... first time through, 'i' is 0 so we print (6-0)*2 = 12
       spaces; second time through, 'i' is 1 so we print (6-1)*2 = 10
       spaces.  Or, you can do this other ways.  You might then use
       another loop to print the numbers... there are different ways
       to go about doing this. */
}

Just an example of how you might start.

[haniunited]

thanks very much
even i did not understand almost anything

but i will try

[haniunited]

any1 knows ?
the answer?

[quzah]

Yes. Lots of us know the answer. Here, let me let you in on a few "secrets":

Welcome to the boards. If you haven't already done so then please take some time to familiarise yourself with the faq:
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Remember, too, that the board has a search facility, a link is at the top of your screen:
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It will often get you a quicker answer to your questions than waiting for a response to one you have posted.

It appears that you are posting a homework assignment or other project.

Please don't ask people to do all your work for you, See the announcement on Homework at the top of all forums to see what is acceptable or PM me. Basically people are happy to help, but they're not going to do it all for you.

Show us what you've got, show your code (using code tags), or where you're confused and someone will be happy to help you I'm sure. If it's something that you absolutely don't understand how it works, like you have no clue how qsort works, then ask a general question about the function and I'm sure someone will explain it. Though they may not give you all of the code for it, but someone will explain the concept.


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Feel free to PM me with any questions.

Good Luck,

Kermi3

Read and follow the above instructions, and try your post (in the same thread) again.

Quzah.

[haniunited]

man u all missed understanding me
i am thinking
i just not reaching the correct thing

here is what i arrived until now
plaese any1 post the right code if its not

#include<stdio.h>
void main ()
{
int i,j,t,n;

printf("Please enter a number\n");
scanf("%d",&n);
x=(n-i)*2
for(i=1;i<=n;i++)
{
for(j=1;j<=n;j++)
printf(" ");

for(t=1;t<n;t++)
printf("%d,t);
for(t=n;t>=1;t--)
{
if(t!=1)
printf("SPACE HERE THEN %d",n);
else
printf(%d"t)
{
printf("\t");
}
}

[spydoor]

This much was already given to you in pseudo code...
There is still some work left to do

#include<stdio.h>

int main()
{
    int i,j,number;

    printf("Please enter a number: ");
    scanf("%d",&number);

    for(i=number; i > 0; i--) {
        /* print leading spaces */
        for(j=0; j < (i-1) * 2; j++) {
            putchar(' ');
        }

        /* need a loop or 2 loops or something here */
        printf("%d \n", i);
    }

    return 0;
}

[haniunited]

am sorry i dont get it

this is only my 2nd day programming

[spydoor]

did you even, compile, run and try to understand the code?

considering the time between posts I doubt it.

giving you the complete code will not help you at all.

I'll try to explain what's going on:
the outer loop simply counts down from the entered number to 1

if you remove the inner loop you'll see it prints a count down

the next step is to print the leading spaces for each row. so we add a loop that prints from 0 to (i-1) * 2 spaces. where i is the current row.

all that's left is to print the rest of the triangle.

how about instead of just a printf you add a loop that prints from i (the current row) to number. something like

for(k=i; k <= number; k++) {
   printf("%d ", k);
}
printf("\n");

now all that's left is to print the right half of the triangle. (another loop before the newline)

[haniunited]

any1?

[Dave_Sinkula]

And your latest attempt?

I'll try to help with another start:

#include<stdio.h>

void foo(int target)
{
   int i, j;
   for ( i = 0; i < target; ++i )
   {
      /*
       * Leading spaces:
       */
      for ( j = 1; j < target - i; ++j )
      {
         printf("  "); /* two spaces */
      }
      /*
       * Initial sequence:
       */
      for ( /* leave j where it was, at (target - i) */; j <= target; ++j )
      {
         printf("%d ", j);
      }
      /* more code */
      putchar('\n');
   }
}

int main()
{
   foo(7);
   return 0;
}

/* my output
            7 
          6 7 
        5 6 7 
      4 5 6 7 
    3 4 5 6 7 
  2 3 4 5 6 7 
1 2 3 4 5 6 7 
*/

Surely you can make an attempt at completing this.