Simple algorithm question

[newbie]

This is an embarassingly easy algorithm, but I seem to have got a mental
block -

Here is a code snippet:

void OffsetToParts(const short midnightOffset, short *hours, short
*minutes, short *seconds)
{
hours = midnightOffset / 3600;
minutes = (midnightOffset / 60) % 60;
seconds = midnightOffset % 60;
}

Now I want to write a function like this :

short PartsToOffset(const short hours, const short minutes, const short
seconds)
{
// ...
}

Any helpers out there ?

[Fei Liu]

newbie wrote:

This is an embarassingly easy algorithm, but I seem to have got a mental
block -

Here is a code snippet:

void OffsetToParts(const short midnightOffset, short *hours, short
*minutes, short *seconds)
{
hours = midnightOffset / 3600;
minutes = (midnightOffset / 60) % 60;
seconds = midnightOffset % 60;
}

Now I want to write a function like this :

short PartsToOffset(const short hours, const short minutes, const short
seconds)
{
// ...
}

Any helpers out there ?

This is probably off topic, but you are looking for something like this:
hour * 3600 + minute * 60 + second

Now just translate that into C++ and finish the function PartsToOffset.

F

[anon]

newbie wrote:

This is an embarassingly easy algorithm, but I seem to have got a mental
block -

Here is a code snippet:

void OffsetToParts(const short midnightOffset, short *hours, short
*minutes, short *seconds)
{
hours = midnightOffset / 3600;
minutes = (midnightOffset / 60) % 60;
seconds = midnightOffset % 60;
}
Any helpers out there ?

I do not know your requirements, but in OffsetToParts function, you are
changing the address of hours, minutes and seconds

[Victor Bazarov]

anon wrote:

newbie wrote:

>This is an embarassingly easy algorithm, but I seem to have got a
mental block -

Here is a code snippet:

void OffsetToParts(const short midnightOffset, short *hours, short
*minutes, short *seconds)
{
hours = midnightOffset / 3600;
minutes = (midnightOffset / 60) % 60;
seconds = midnightOffset % 60;
}
Any helpers out there ?

I do not know your requirements, but in OffsetToParts function, you
are changing the address of hours, minutes and seconds

In C++ I'd probably pass each short by reference, not a pointer to it.

V
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[red floyd]

newbie wrote:

This is an embarassingly easy algorithm, but I seem to have got a mental
block -

Here is a code snippet:

void OffsetToParts(const short midnightOffset, short *hours, short
*minutes, short *seconds)
{
hours = midnightOffset / 3600;
minutes = (midnightOffset / 60) % 60;
seconds = midnightOffset % 60;
}

Now I want to write a function like this :

short PartsToOffset(const short hours, const short minutes, const short
seconds)
{
// ...
}

Any helpers out there ?

You are aware that there are 86400 seconds in a day, and that on most
platforms, that won't fit into a short, right?