Insert parameter in a string with C

Question

I would like to run the following OS X command:

md5 <<< 'password'

Password is actually supposed to be a parameter, therefore I would like to know how can I "concatenate / insert" a string into another, just like we can do with printf:

char password[] = "password";
//Something like this:
char command[] = ("md5 <<< '%s'", password);

How is it possible in C?

Thanks alk. I didn't know exactly how to ask therefore I was also not able to find an answer. — Malo Polsky, Sep 27 '15 at 12:26

king · Answer 1 · 2015-09-27T12:26:29.890

-1

strcat I think do the job :char *strcat(char *dest, const char *src).

char res[30]; //malloc would be better
strcpy(res, "md5 <<< ");
strcat(res, password);

edited Sep 27 '15 at 12:26

answered Sep 27 '15 at 12:14

king

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A guess is not an optimal answer. You should at least show how to do it. – alk Sep 27 '15 at 12:15

Insert parameter in a string with C

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