concatenating arrays of strings using macro

Question

I need to concatenate two arrays of string and need to call the function with that string

I have two arrays

char q[4] = {'t','e','s','t'};
char w[4] = {'f','u','n','c'};

#define dump(a,b)  a ## b

I have a function called

void testfunc()
{

...
..

}

if I call the macro dumb like dumb(q,w) this is just concatenating q and w, i need to concatenate the strings in that array.

Need to call the function by concatenating the arrays of string using macros. Is that possible??

Those aren't strings. Strings (in C) are NULL-terminated, meaning the last character will be '\0', which you did not include. — abelenky
– abelenky, Commented Oct 3, 2013 at 21:18
do you want to use macros to expand to differnt function names? maybe you could use function pointers instead? — jev
– jev, Commented Oct 3, 2013 at 21:21

Oliver Charlesworth · Accepted Answer · 2013-10-03 21:10:15Z

4

No. Macros don't understand C constructs (such as arrays), they just perform simple text substitution.

answered Oct 3, 2013 at 21:10

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Comments

jev · Accepted Answer · 2013-10-03 21:40:34Z

0

I just want to call the function testfunc() which name is stored in two array char

Although you can't use macros in this case you could have an array for function pointers and select one you want to call at run time.

void (*p[NFUNCS])(void);
//...
p[0] = testfunc; /* store address of the function */
//...
(*p[0])(); // call to testfunc

answered Oct 3, 2013 at 21:40

jev

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