Thread: Printing array

Hey, I am trying to print a 2D (3x3) array like this:

Code:

1 2 3
4 5 6
7 7 7

I tried a while loop but it didnt work of course, could someone help be make it print like the above?

Code:

#include <stdio.h>
#define NUM_ELEMENTS 3

int main()
{
	int x[NUM_ELEMENTS][NUM_ELEMENTS]; //Declaration of the array
	//int y[NUM_ELEMENTS][NUM_ELEMENTS];
	//int z[NUM_ELEMENTS];

	for(int a=0; a<NUM_ELEMENTS; a++)
	{
		for(int b=0; b<NUM_ELEMENTS; b++)
		{
			printf("Enter row &#37;d and column %d: \n",a,b);
			scanf("%d",&x[a][b]);
		}
	}

	printf("\n"); //Space
	//int loop=0;

	for(int i=0; i<NUM_ELEMENTS; i++)
	{
		for(int j=0; j<NUM_ELEMENTS; j++)
		{
			//while(loop != 3)
			//{
			printf(" %d ",x[i][j]); //Printing of array contents
			//loop++;
			//}
		}
	}
}

Right now it prints like this:

Code:

1
2
3
4
5
6
7
7
7

Thanks

Are the single-line comment identifiers // considered acceptable under c99 ANSI standard? They are used in C++, correct? Also, are you just leaving some of your code out ( ie variable initializers?) or can // be used outside of commenting ( as you have //int loop = 0)? I am just learning and this is unfamiliar to me, so I wanted to ask.

Yes, // comments are C99 and C++. But not C89, but most compilers support them as a compiler extension (or just support them anyway...).

No, // doesn't mean anything but a comment. Although / means divide, // is not double divide or anything

Code:

for(int i=0; i<NUM_ELEMENTS; i++)

Isn't C89 anyway...

Okay, but what about the second part of my query? Are we just generalizing the code to get to the point of the original question or are the // being used to initialize loop?
Sorry, if I'm being daft, but I'm not going to learn if I don't ask.

No... I edited my post to include that