hello

[MaseratiDeluxe]

hey guys need some help on a question.

show the prototype (i.e. declaration) of a function that passes an int by value, a float by value, and a char by value and returns a character value.

[Disch]

We can't really help without giving away the answer.

Maybe take a guess at it, and we can point out your mistakes?

[MaseratiDeluxe]

int passval(val1,val2)

float passval(val1,val2)

char passval(char, char)

[Disch]

char passval(char, char)

This is very close.

This is returning a char, and has 2 char's passed to the function by value.

So the return type is correct. But the parameters are wrong. You need to pass in an int, a float, and a char.

Also, prototypes have to end with a semicolon ;

[MaseratiDeluxe]

ya that's what I'm having trouble with is figuring out what should be in the parameters. and I'm not entirely sure what, pass an int, a float, and a char, actually mean.

[Disch]

char passval( char, char )
                ^     ^
                |     |
                |     |
     passing a char   |
                      |
               and a char

So if you're passing 2 chars... what do you think you'd have to change to pass a int and a float?

[MaseratiDeluxe]

char passval(char, int);?
or
char passval(char, float);?

[Disch]

char passval(char, int);

This passes a char and an int

char passval(char, float);

This passes a char and a float.


You need to pass an int, a float, and a char. In that order.


EDIT:

The basic syntax of a function is:

returntype functionname(paramtype1, paramtype2, paramtype3, etc);

So say you want a function that:
- returns an int
- passes a char and a double by value as parameters
- is named "myfunction"

It would look like this:

int myfunction( char, double );



Here, your assignment doesn't seem to care what the function is named, so that doesn't matter as long as it's a legal name (no spaces or weird symbols). All you have to do is get the return type and parameters right.

[MaseratiDeluxe]

I'm sorry, are you saying i need to put three arguments inside one parameter, such as,

int passval(int,float,char);

[Disch]

int passval(int,float,char);

This has the parameters correct. However you changed the return type. The function needs to return a char, not an int.

I'm sorry, are you saying i need to put three arguments inside one parameter, such as,

Your terminology is a little wonky, which might be why this is confusing.

"parameter" and "argument" basically mean the same thing (I think there is a subtle difference, but I can never remember what it is, and the two terms are largely interchangeable).

arguments go inside of the same set parenthesis

[MaseratiDeluxe]

ya, sorry. thanks for your time I'm still new at this. i can tell C++ takes many years of doing it to become efficient and flawless with it. well i guess ill just keep plugging away.