HOW TO BECOME PROFICIENT IN C

So I claimed I was proficient in a number of languages on my resume, all of which I've barely used.

I think I can get away with some of it but I really think I need to know how to use C and Python well for the job. He said the job might require C# which is close enough to core C.

How do I become proficient with these languages in a week or so?

>>47
do not listen to him. he was just pointing to stupid things while missing the obvious error.

use realloc instead of second malloc. you are malloc ing new memory and lose the old address (which gives a memory leak btw) this new address points to a new memory location which is filled with garbage. it does not contain old data.