How can I make an array of char arrays?

Projects Programming
1

I have several strings stored in char arrays. I'd like to to some things like:

char string0[10];
char string1[10];
char string2[10];
char string3[10];
char string4[10];

//somehow make an array or something of those strings called arrayOfStrings

for (int i; i<5; i++)
{
	Serial.print(arrayOfStrings[i]);
}

If I were using Strings, I'd do:

String string0;
String string1;
String string2;
String string3;
String string4;

String* arrayOfStrings[5] =
{
	&string0;
	&string1;
	&string2;
	&string3;
	&string4;
}

for (int i; i<5; i++)
{
	Serial.print(arrayOfStrings[i]);
}

...but I don't know how to do that with char arrays. How can I do that?

2

Do you know how to declare an 2 dimensional array ?

3

Yes, I've tried

char* arrayOfStrings[10][5] =
{
	&string0[10];
	&string1[10];
	&string2[10];
	&string3[10];
	&string4[10];
}

but something about that didn't work, I don't remember why right now. Is that what you're thinking?

4

&stringX[10] does not exist when you declare a 10 element array. Try &stringX[0], a pointer to the first element of stringX, which is what you want, anyway.

5

KeithRB:
Try &stringX[0], a pointer to the first element of stringX

Which is the same thing as just stringX

Here are two solutions:

This one will waste some memory

char strings[][10] = // 10 is the length of the longest string + 1 ( for the '\0' at the end )
{
	"hello",
	"bonjour",
	"guten tag"
};

And this one is less pleasant to look at

char string1[] = "hello";
char string2[] = "bonjour";
char string3[] = "guten tag";

char * strings[] = 
{
	string1,
	string2,
	string3
};
1 Like
6

Actually it is not the same thing and you are more correct. &StringX[0] is a pointer to a char, and StringX is a pointer to an array.

7

Thanks, guix. That second one got me where I needed to go.