How to change/print pattern.

[td0g03]

Hello, I just have a few questions. The first one be how would you print a pattern. I could use the if else, but I remember my teacher talking about something like

for(i=1;i<=size;i)
   printf($);
 

Code below will take the size of what I input and change the size of the pattern by adding more or less $

So if the user type number 6 it would print

                6 $ $ $ $ $
                $ 6 $ $ $ $
                $ $ 6 $ $ $
                $ $ $ 6 $ $
                $ $ $ $ 6 $    
 

#include <stdio.h>
 
#define QUIT 5
 
//    Prototype Definitions 
void  printMenu (void);
int   getOption (void);
int   getSize   (void);
void  printPattern( int size, int option );
void  printOne  ( int size );
void  printTwo  ( int size );
void  printThree( int size );
void  printFour ( int size );
 
int main (void)
{
//    Local Definitions 
    int option;
    int size;
 
//    Statements 
    printf("\nBeginning of Program.\n");
 
    option = getOption();
    while (option != QUIT)
    {
        size = getSize();
        printPattern( size, option );
        option = getOption();
    } 
 
    printf("\nEnd of Program.\n");
 
    return 0;
}// main 
 
/*    ==================== printMenu ====================
    This function prints a menu 
       Pre   nothing 
       Post  nothing 
*/
void printMenu (void)
{ 
 
    printf("\n*********************");
    printf("\n*     M E N U       *");
    printf("\n*                   *");
    printf("\n*  1. Pattern One   *");
    printf("\n*  2. Pattern Two   *");
    printf("\n*  3. Pattern Three *");
    printf("\n*  4. Pattern Four  *");
    printf("\n*  5. Quit          *");
    printf("\n*                   *");
    printf("\n*********************");
 
    return;
}
/*    ==================== getOption ====================
    This function shows a menu and reads the user option.
       Pre   nothing 
       Post  returns a valid option 
*/
int getOption (void)
{ 
//    Local Definitions 
    int option;
 
//    Statements 
    printMenu();
    printf("\n\n\nPlease type your choice ");
    printf("and press the return key : ");
    scanf("%d", &option);
    while (option < 1 || option > 5)
    {
        printf("\nInvalid option. Please re-enter.\n\n");
        printMenu();
         printf("\n\n\nPlease type your choice ");
        printf("and press the return key : ");
        scanf("%d", &option);
    }
 
    return option;
}// getOption 
 
 
/*    ==================== getSize ====================
    This function gets the size of the pattern 
       Pre   nothing 
       Post  returns a valid size
*/
int getSize (void)
{ 
//    Local Definitions 
    int size;
 
//    Statements 
    printf("\n\n\nPlease type the size of the pattern [2 - 9]: ");
    scanf("%d", &size);
    while (size < 2 || size > 9)
    {
          printf("\nInvalid size. Please re-enter.\n");
          scanf("%d", &size);
    }
 
    return size;
}// getSize 
 
/*    ==================== printPattern ====================
    This function receives a pattern's size and the 
    user's option and prints the corresponding pattern.
       Pre   size
             option
       Post  pattern printed 
*/
void printPattern( int size, int option )
{
//    Local Definitions 
 
//    Statements 
    switch (option)
    {
        case 1: printOne(size);
                break;
    case 2: printTwo(size);
                break;
    case 3: printThree(size);
                break;
    case 4: printFour(size);
                   break;
    }
 
    return;
}// printPattern
 
/*    ==================== printOne ====================
    This function receives the size of pattern one and 
    prints it. For instance, if size is 5, output would 
    be:
                5 $ $ $ $
                $ 5 $ $ $
                $ $ 5 $ $ 
                $ $ $ 5 $
                $ $ $ $ 5    
       Pre   size
       Post  pattern one printed 
 
*/
void  printOne  ( int size )
{
//    Local Definitions 
 
//    Statements 
    for(i=!;i<=n;i
    printf("%d",size);
 
    return ;
}// printOne
 
/*    ==================== printTwo ====================
    This function receives the size of pattern two and 
    prints it. For instance, if size is 3, output would 
    be:
 
 
 

(Took most of the code out)

Sorry if this is confusing. Not sure how else I can explain it.

[DeMan]

I didn't really look at the code but basically the logic would be:
(in non-specific pseudocode

loop (i from 0 to  size)
  loop (j from 0 to size)
    if( i = j)
      print size;
    else
      print symbol
    endif
  endloop
  print newline;
endloop
 

I think!!!

[td0g03]

I didn't really look at the code but basically the logic would be:
(in non-specific pseudocode

loop (i from 0 to  size)
  loop (j from 0 to size)
    if( i = j)
      print size;
    else
      print symbol
    endif
  endloop
  print newline;
endloop
 

I think!!!

Hmm, how about if you wanted to use for

[DeMan]

my code is non language specific...

so the loop statement could be replaced with something like

for(int i = 0; i< size; i++)
{
doThings()
}
 

same goes for the rest.......

[td0g03]

my code is non language specific...

so the loop statement could be replaced with something like

for(int i = 0; i< size; i++)
{
doThings()
}
 

same goes for the rest.......

How would I control it so if I only wanted to hardcore that there only can print four $ only and no more no less.

[DeMan]

I assunme you mean

5 $ $ $ $
$ 5 $ $ $
$ $ 5 $ $
$ $ $ 5 $
$ $ $ $ 5
 

set size to 5 and inlcude the nested for loops.

If you want 4 $ signs without the 5 down the centre, try two nested loops (at size 4) without the if statement (ie remove "if i=j")

if you want just 4 in a row you can either print them literally:
printf(" $ $ $ $");
or for a single loop from 1 to 4......

[td0g03]

/*    ==================== printOne ====================
    This function receives the size of pattern one and 
    prints it. For instance, if size is 5, output would 
    be:
                5 $ $ $ $
                $ 5 $ $ $
                $ $ 5 $ $ 
                $ $ $ 5 $
                $ $ $ $ 5    
       Pre   size
       Post  pattern one printed 
 
*/
void  printOne  ( int size )
{
//    Local Definitions 
    int i;
//    Statements 
    printf("\n\n\t\t");
    printf("%d",size);
    for(int i = 1; i< size; i++)
    {
        printf(" $");
 
    }// first line
 
 
    printf("\n\t\t$ ");
    printf("%d",size);
    for(int i = 2; i< size; i++)
    {
        printf(" $");
 
    }// second line
 
    printf("\n\t\t$ $ ");
    printf("%d",size);
    for(int i = 3; i< size; i++)
    {
        printf(" $");
 
    }// third line
 
    printf("\n\t\t$ $ $ ");
    printf("%d",size);
    for(int i = 4; i< size; i++)
    {
        printf(" $");
 
    }// fourth line
 
    printf("\n\t\t$ $ $ $ ");
    printf("%d",size);
    for(int i = 5; i< size; i++)
    {
        printf(" $");
 
    }// fifth line
 
    printf("\n\n\n");
 
    return ;
}// printOne
 
 

The result when I enter pattern 5, I get

Please type the size of the pattern [2 - 9]: 5
 
 
                5 $ $ $ $
                $ 5 $ $ $
                $ $ 5 $ $
                $ $ $ 5 $
                $ $ $ $ 5
 
 
 

However, if I push pattern 3 or 4 I get a messed up pattern.

 
 
                3 $ $
                $ 3 $
                $ $ 3
                $ $ $ 3
                $ $ $ $ 3
 
                4 $ $ $
                $ 4 $ $
                $ $ 4 $
                $ $ $ 4
                $ $ $ $ 4
 
 

I know its the way I coded it, but how would you do it?

I'm thinking I would have to do something like this

void  printOne  ( int size )
{
//    Local Definitions 
    int i;
//    Statements 
 
    printf("%d",size);
    for(int i = 1; i< size; i++)
    {
        printf(" $");
        printf("\n");
 
    }// first line
 

Which would print.

5
$
$
$
$

Is the way I'm thinking correct? Thanks in advance.

[DeMan]

pyut two gfor loops inside each other:

for(int i=0; i< size i++)
{
  for(int k=0; < size; k++)
  {
    //do your printing here, print size if i=k and $ otherwise
  }
//print newline here
}
 

[td0g03]

[quote]=DeMan]pyut two gfor loops inside each other:

for(int i=0; i< size i++)
{
  for(int k=0; < size; k++)
  {
    //do your printing here, print size if i=k and $ otherwise
  }
//print newline here
}
 

[/QUOTE

Ahh, I see. Another question how would you put a number in there?

5 $ $ $ $
$ 5 $ $ $
$ $ 5 $ $
$ $ $ 5 $
$ $ $ $ 5

This is what I'm getting

 
5 $5 $5 $5 $
5 $5 $5 $5 $
5 $5 $5 $5 $
5 $5 $5 $5 $
 
void  printOne  ( int size )
{
//    Local Definitions 
    int i;
    int k;
//    Statements 
 
 
    for(int i=1; i<=4; i++)
    {
       for(int k=1; k< size; k++)
       {
               printf("%d",size);
               printf(" $");
       }
    printf("\n");
    }
    return ;
 

[DeMan]

As per the pseudocode originally posted, you need some sort of test....

We have different things tio print on different conditions...

if i=j we want to print the number, otherwise we can print the $ so

if( i==k) //need to equals signs if we're testing
{
  printf("%d", Size);
}
else
{
  printf("$");
}
 

[td0g03]

How about if I wanted

5 $ $ $ $
$ 5 $ $ $
$ $ 5 $ $
$ $ $ 5 $
$ $ $ $ 5

I figured I would change the ++ to -- and make the >=, but that doesn't seem to work for me.

[DeMan]

I don't really understand how that is different to what we are doing (although I notice in your code you have a hard coded 4 where you may have meant Size -> 1st for loop)

Do you mean how to get the numbers to follow throyugh the other way?