Thread: Printing Array help

My new problem:
Ok, I think I am doing this right. How do I get it to print the new array after I have changed the element to the guest initial?

EDIT: Also I know that I am probably not doing this the best way possible, but I have to do it the way I know how, I want to understand what I am doing, and this is just the way I work it out.

This is what I have:

Code:

#include <stdio.h>
#define ROWS 4
#define COLUMNS 2

#include <stdio.h>

void printArray(int a[][2]);
void modifyElement(int e, char guest);

int main()
{
	int table[ROWS][COLUMNS]={1,2,3,4,5,6,7,8};
	int seat;
	int r;
	int c;
	char guest, junkChar;

	printArray(table);
    getchar();

	printf("In which seat would you like to place a guest?\n");
	scanf("%d",&seat);

	scanf("%c",&junkChar);
	printf("What is the initial of the guest you would like to place in this seat?\n");
	scanf("%c",&guest);

	switch(seat){
	case 1:
		r=0;c=0;
		break;
	
	case 2:
		r=0;c=1;
		break;
	
	case 3:
		r=1;c=0;
		break;
	
	case 4:
		r=1;c=1;
		break;
	
	case 5:
		r=2;c=0;
		break;

	case 6: 
		r=2;c=1;
		break;

	case 7:
		r=3;c=0;
		break;

	case 8:
		r=3;c=1;
		break;

	default:
		printf("You have entered an invalid seat number, please restart program.\n");

		return 0;
		break;
	}
	
	modifyElement(table[r][c],guest);

	
	return 0;

}

void printArray(int a[][2])
{
	int i;
	int j;
    printf("\t_____U____\n");
	for(i=0;i<=3;i++) {

		for(j=0;j<=1;j+=2){
			printf("\t%d|\t|%d\n",a[i][j],a[i][j+1]);
		}

	}
	printf(" \t----------\n");
}

void modifyElement(int e, char guest)
{
	
	e = guest;
	
}

ORIGINAL POST (already figured out):
How would I write a function to print an array that looks like this:

__U__
1| |2
3| |4
5| |6
7|___|8

I am able to get the array, but dont know how to get the lines.

Thanks in advance for any input.

EDIT: Its actually supposed to look like a rectangular table with columns 1,3,5,7 and 2,4,6,8. I dont know why I cant make it look right in this post.

Maybe use formatting tags

Code:

 __U__
|1 |2 |
|3 |4 |
|5 |6 |
|7 |8 |

This shouldn't be very difficult if you know how printf() works. Here is an example of one of your lines:

Code:

printf(" __U__ ");
printf("|%d |%d |", var[0][0], var[0][1]);

You're not being clear at all as to what you need to do.

Is this a character array that you need to add lines and spaces to?

Is it integers that you just need to output in a function?

Did you make any attempt at this, yet?

Just because you teacher says put it in a function doesn't mean you don't use standard output functions. You have to tell me what the exact assignment is. For all I know, you have an integer array that you just need to make a function that loops through the array and outputs it into a table.

Why are you bothering with a two dimensional array? Really, why are you even bothering with seating at all?

Ms. White will be serving dinner, of course.

You know that Professor Plum and Colonel Mustard will start arguing about the necessity of commenting code if they sit next to or directly across from each other.

You also know that Ms. Scarlet once copied a program of Ms. Peacock’s. As a result they cannot sit next to or across from each other without arguing.

Just stick them all in the Conservatory with a lead pipe and a candle stick, and soon all you'll have to seat is one person.


Quzah.

Not unless the police arrive, and unfortunately, Mr Body never called them.

I am mssing around with modifying one element of the array, and its not working out. I am just getting a junk number. What am I doing wrong? I am using a function modifyElement, the actual element is not being passed. I am thinking it has something to do with the int e.

Code:

#include <stdio.h>
#define ROWS 4
#define COLUMNS 2

#include <stdio.h>

void printArray(int a[][2]);
void modifyElement(int e);

int main()
{
	int table[ROWS][COLUMNS]={1,2,3,4,5,6,7,8};

	printArray(table);
    getchar();

	modifyElement(table[4]);

	return 0;

}

void printArray(int a[][2])
{
	int i;
	int j;
    printf("\t_____U____\n");
	for(i=0;i<=3;i++) {

		for(j=0;j<=1;j+=2){
			printf("\t%d|\t|%d\n",a[i][j],a[i][j+1]);
		}

	}
	printf(" \t----------\n");
}

void modifyElement(int e)
{
	int newValue;

	newValue= e*2;
	printf("Value by 2 is %d\n",newValue);
}

EDIT: nevermind, played around with it and figured it out.

Well for starters, your initialization of the array leaves a lot to be desired. Furthermore, why are you even bothering with a multidimension array? One will do just fine:

Code:

for( x = 0; x < sizeof( array ) / sizeof( array[ 0 ] ); x++ )
{
    draw left wall
    display number
    if x is odd
        draw right wall and newline
}
if x is odd then we have ended with an uneven setting
    draw right wall, space, right wall, newline

Quzah.