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go to the homework forums - there is a calc section for textbook and homework problems.

Try some local contract work. Or take on a pro-Bono project for Salvation Army or something. Startup companies are far more likely to hire you as well.

The reason things are like this is...

Chris is right - the answer is totally language dependent. In general there no functions like that in most high level languages, some databases provide that capability, as do a few specialy...

#include <unistd.h>
#include <errno.h>

int change_priority(int value)
{
int retval=0;
errno=0;
retval=nice(value);
if(errno && retval=(-1) )
{

the functions count_char and test_letter_content are from
something else, but they provide:

an example of changing case
a way to compare the letter content of two char arrays

I put a...

That is Os dependant - what OS?

It is IT management and possibly some system admin or maybe DBA stuff - infrastructure support in general.

Software development and maintenance are sort of tangential to your field of study.
In...