Structures type? - Dev Articles

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December 3rd, 2004, 04:14 PM

loopy123

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Join Date: Dec 2004

Posts: 13

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Structures type?

When you create a structure , it can make a new type of data aside from int, double, etc.
Can you declare a function with the new type?

for example:

Quote:

struct realnumber{double real, angle;};

...

realnumber topolar(realnumber number)
{
realnumber result;
result.angle = atan2(...//y/x)
return result;
}

I tried this, and it gives me an error saying "realnumber was not declared within this scope" on the first line of the topolar function.

How do I fix this?

EDIT!: The problem seems to be more with the bold realnumber

December 4th, 2004, 06:59 AM

kode_monkey

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Join Date: Jul 2003

Posts: 367

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You can do this but you need to do one of two things.

1) Put the keyword struct before realnumber in the function definition line.
2) Typedef the struct to let you use a single word.

So either -

Code:

struct realnumber
{
  double real;
  double angle;
};

struct realnumber topolar (struct realnumber number) {}

Code:

typedef struct rn
{
  double real;
  double angle;
} realnumber;

realnumber topolar (realnumber number) {}

Hope this helps,

-KM-

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