Thread: Printing Array help

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;
	
}

Well modifyElement doesn't actually do anything. Both items are passed by value, so in effect, nothing at all happens. You'll probably want to use pointers. Although I'm not really sure what it is you're trying to do with that function.


Quzah.

Originally Posted by quzah

Well modifyElement doesn't actually do anything. Both items are passed by value, so in effect, nothing at all happens. You'll probably want to use pointers. Although I'm not really sure what it is you're trying to do with that function.


Quzah.

Yeah, I see that nothing is actually happening, all I really did was set e to the entered character. The function is supposed to modify the chosen element. (The seat number needs to be changed to the guest's initial).

Also, dont think I need to use pointers, as that is in the next chapter.