Thread: Basic Question - How to convert char array element to a string?

So I want to create a string which consists of multiple pre-defined chars, but I'm not sure how to do this.

I want to say something like

Code:

char Txdata[] = Buffer[0][j], Buffer[0][i];

(Where Buffer is an array of chars) But I know that's definitely not right.

Is it a simple syntax job, or do I need to do something like type casting?

Thanks for any help!

Try

Code:

char Txdata[3];
Txdata[0] = Buffer[0][j];
Txdata[1] = Buffer[0][i];
Txdata[2] = '\0';

Originally Posted by Elkvis

or even:

Code:

char Txdata[] = { Buffer[0][j], Buffer[0][i], 0 };

That's more like it!

Originally Posted by Elkvis

or even:

Code:

char Txdata[] = { Buffer[0][j], Buffer[0][i], 0 };

Thanks for the reply. However, I get an error with this "constant expression required"

Originally Posted by laserlight

Are you sure? If Buffer is an array of chars, then Buffer[0] is a char, so Buffer[0][j] is an error, assuming j is an index.

Buffer is a 2D array of chars, as declared:

Code:

char Buffer[100][5];

I realise that I don't think I was quite clear what I'm after. So I'm looking to transmit the Txdata as a string, so for example I could write

Code:

char Txdata[] = "Test";

Which would transmit Test.So say for example Buffer[0][1] = 5, and Buffer [0][2] = 10, then the end result I'd hope for would be the equivalent of sending:

Code:

char Txdata[] = "5, 10, ";

Any thoughts? I'm not sure at all on this!