Function help

**Ameteur hour** · 07-19-2014

Hey guys just wondering if someone can help me understand this question and give me a bit of guide line as to how to do it!

Q.
Write a function that takes a string value for the day of the week as input and returns 1 if it is a weekday (mon-fri), otherwise it returns 0. Use appropriate types for the variables

**laserlight** · 07-19-2014

What exactly do you not understand about the question?

**Ameteur hour** · 07-19-2014

I don't understand the returns 1 if it is a weekday otherwise returns 0. And does the program user enter what day it is?

**laserlight** · 07-19-2014

Originally Posted by Ameteur hour

I don't understand the returns 1 if it is a weekday otherwise returns 0.

That just means that somewhere in the body of the function, you will have:

Code:

return 1;

and at another place:

Code:

return 0;

Originally Posted by Ameteur hour

And does the program user enter what day it is?

This is not stated, so presumably it is up to you how you want to test and demonstrate the usage of the function. If your function is named is_weekday, then I would expect these to work:

Code:

if (is_weekday("mon"))

Code:

char day[] = "mon";
if (is_weekday(day))

**Ameteur hour** · 07-19-2014

So is what you're saying i do something like this in the function?

Code:

if(days_week("Monday"))
    {
        return 0;
    }


    if(days_week("Tuesday"))
    {
        return 0;
    }


    if(days_week("Wednesday"))
    {
        return 0;
    }
    if(days_week("Thursday"))
    {
        return 0;
    }


    if(days_week("Friday"))
    {
        return 0;
    }


    if(days_week("Saturday"))
    {
        return 1;
    }


    if(days_week("Sunday"))
    {
        return 1;
    }

**laserlight** · 07-19-2014

What is days_week?

**Ameteur hour** · 07-19-2014

The name of the function.

**laserlight** · 07-19-2014

No, if that was the name of the function, then that cannot also be in the body of the function unless you're doing recursion, which isn't appropriate here.

**vart** · 07-19-2014

also your logic is opposite to the requested by the question

**Ameteur hour** · 07-19-2014

That's because i don't understand the question :/

**stahta01** · 07-19-2014

Do you know how to call a function; if not then, you need to learn that before laserlight post #4 will make sense.

Edit: You appear to have no idea of the difference between a function body and calling a function.

Tim S.

**laserlight** · 07-20-2014

Originally Posted by Ameteur hour

That's because i don't understand the question :/

Here is a question that I shall pose to myself, along similiar lines as to what was posed to you.

Q.
Write a function that prints "Hello world!" to standard output. Use an appropriate function from the standard library.

A.

Code:

void print_greeting(void)
{
    printf("Hello world!\n");
}

Does this make sense to you?

**zub** · 07-23-2014

Originally Posted by Ameteur hour

So is what you're saying i do something like this in the function?

Code:

if(days_week("Monday"))
    {
        return 0;
    }

// ...

    if(days_week("Sunday"))
    {
        return 1;
    }

Code:

int weekend(const char* const day)
{
    return day[0] == 'S';
}

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