Text Array

[KirAsh4]

Is there a way to do something like this:

Code: [Select]

char sNames[7] = {'Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sun'};

Serial.print(sNames[1]);

And have it output 'Mon' ?

Seems silly to have to write a switch case to figure out what to print.

[lloyddean]

Code: [Select]


char* sNames[] = {
     "Sun" // 0
   , "Mon" // 1
   , "Tue" // 2
   , "Wed" // 3
   , "Thu" // 4
   , "Fri" // 5
   , "Sat" // 6
};

Serial.print(sNames[1]);


[KirAsh4]

Danke!

[AWOL]

Is there a way to do something like this:
Code:

char sNames[7] = {'Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sun'};

NB - double quotes and a pointer.

[guix]

Or,

Code: [Select]


char sNames[7][4] = {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sun"};


[PaulS]

Code: [Select]

char sNames[7][4] = {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sun"};

On some calendars, Sat comes after Fri.

[PeterH]

Or,

Code: [Select]


char sNames[7][4] = {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sun"};


What does that actually do? And specifically, what does it do if the number of characters in an initialiser string is not 3?

[llukkari]

Or,

Code: [Select]


char sNames[7][4] = {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sun"};


What does that actually do? And specifically, what does it do if the number of characters in an initialiser string is not 3?

That would create a matrix like this

	0	1	2	3
0	'S'	'u'	'n'	'\0'
1	'M'	'o'	'n'	'\0'
2	'T'	'u'	'e'	'\0'
3	'W'	'e'	'd'	'\0'
4	'T'	'h'	'u'	'\0'
5	'F'	'r'	'i'	'\0'
6	'S'	'a'	't'	'\0'

[PeterH]

What does that actually do? And specifically, what does it do if the number of characters in an initialiser string is not 3?

That would create a matrix like this

And the second question?

[hart]

Strings should be null terminated, hence 4 instead of 3.

[PeterH]

Strings should be null terminated, hence 4 instead of 3.

Not sure whether you intended that to answer the question I asked, but it doesn't.

[KeithRB]

Simply allocate space that is not used. If it would have been declared as array[5] = "abc" it would contain:

0 1 2 3  4
a b c \0 X

where X is whatever junk was there to begin with. However, no you can also use strcpy(array, "abcd") and not worry about it.

[PeterH]

Simply allocate space that is not used.

That's if the initialiser is smaller than the declared size. What about the other case?

[llukkari]

And the second question?

Absolutely anything can happen, horrible nondeterministic things eg. nasal demon will fly out.

[PaulS]

That's if the initialiser is smaller than the declared size. What about the other case?

There will be an error message from the compiler.