From:	DavMac AT iname DOT com (Davin McCall)
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Pointers passed to functions
Date:	Sat, 06 Nov 1999 00:41:47 GMT
Organization:	Monash Uni
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You must dereference a pointer to convert it to the type of value to
which it points. Building on your example, you should call draw_vimg
with:

	draw_vimg(*mygraphic, 200, 100, 1, 1);

Hope this helps.

Davin.


On Fri, 05 Nov 1999 19:26:56 GMT, "Philip Bock" <philipb AT escape DOT ca>
wrote:

>I have a function whose definition looks like this: (vimg is a struct)
>
>    void draw_vimg(vimg vectimg, int x, int y, int xscale, int yscale);
>
>I want to pass it a vimg defined like so: (gen_vimg creates and sets initail
>values for the struct)
>
>    vimg *mygraphic;
>    mygraphic = gen_vimg();
>
>So I call draw_vimg like this:
>
>    draw_vimg(mygraphic, 200, 100, 1, 1);
>
>And I get errors like this:
>
>    vector.cpp: In function `int main()':
>    vector.cpp:45: conversion from `vimg *' to non-scalar type `vimg'
>requested

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