From: Martin Ambuhl <mambuhl AT earthlink DOT net>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: program wont compile..
Date: Mon, 30 Nov 1998 00:22:30 -0500
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langkjer wrote:
> 
> I can't get the following prog to compile:
[...]

> It says:
> In method 'bog::bog(char *, char *, char *)':
> warning: implicit declaration of function 'int strcopy(...)'
> undefinied reference to 'strcopy' (5 times)

The function is called strcpy().
The following changes

66,67d
61d
59d
57d
53c
int main(void)
.
48,49c
    strcpy(fagnr, denne_bog.fagnr);
.
42c
    strcpy(denne_bog->fagnr, andet_fagnr);
.
28,30c
  strcpy(bog::titel, titel);
  strcpy(bog::forfatter, forfatter);
  strcpy(bog::fagnr, fagnr);
.
5d
3d

produce the following:

#include <iostream.h>
#include <string.h>
class bog;
class bibliotekar {
    public:
    void nyt_fagnr(bog *, char *);
    char *skaf_fagnr(bog);
};

class bog {
    public:
    bog(char *, char *, char *);
    void vis_bog(void);
    friend char
    *bibliotekar::skaf_fagnr(bog);
    friend void
     bibliotekar::nyt_fagnr(bog *, char *);
     private:
    char titel[64];
    char forfatter[64];
    char fagnr[64];
};

bog::bog(char *titel, char *forfatter, char *fagnr)
{
  strcpy(bog::titel, titel);
  strcpy(bog::forfatter, forfatter);
  strcpy(bog::fagnr, fagnr);
}

void bog::vis_bog(void)
{
    cout << "Titel: " << titel << endl;
    cout << "Forfatter: " << forfatter << endl;
    cout << "Fagnr: " << fagnr << endl;
}

void bibliotekar::nyt_fagnr(bog * denne_bog, char *andet_fagnr)
{
    strcpy(denne_bog->fagnr, andet_fagnr);
}

char *bibliotekar::skaf_fagnr(bog denne_bog)
{
    static char fagnr[64];
    strcpy(fagnr, denne_bog.fagnr);
    return (fagnr);
}

int main(void)
{
    bog programmering("C++", "Jamsa", "P101");
    bibliotekar bibliotek;
    programmering.vis_bog();
    bibliotek.nyt_fagnr(&programmering, "P102");
    programmering.vis_bog();
}



-- 
Martin Ambuhl (mambuhl AT earthlink DOT net)
Note: mambuhl AT tiac DOT net will soon be inactive