undefined reference to | Together C & C++ | Page 1

stuck crater Mar 17, 2024, 2:05 PM

#

Hello, can someone look at this main function and tell if there's really an "undefined reference" to basically any of these functions?
The photo is from my header file, and in the functions file i literally defined every each of them.
What's happening?

#include <cstring>
#include "functions.hpp"
#include <iostream>
#include <sstream>
#include <iomanip>
#include <random>

int main(int argc, char* argv[]) {
Node* root = nullptr;
int value;
srand((unsigned) time(NULL));
int i = rand();
char teststring[] = "add";
while (true){
if (argc > 1) {
if (std::strcmp(argv[i], "add" + value))
{
root = insert(root, value);
}
else if (std::strcmp(argv[i], "graph"))
{
printTree(root, 0);
}
else if (std::strcmp(argv[i], "remove" + value))
{
root = remove(root, value);
}
else if (std::strcmp(argv[i], "print"))
{
printAscending(root);
}
}
}
return 0;
}

snow roostBOT Mar 17, 2024, 2:05 PM

#

When your question is answered use !solved to mark the question as resolved.

Remember to ask specific questions, provide necessary details, and reduce your question to its simplest form. For tips on how to ask a good question use !howto ask.

viscid bronze Mar 17, 2024, 2:08 PM

#

What's the error message?

stuck crater Mar 17, 2024, 2:09 PM

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undefined reference to insert(Node*, int)' undefined reference to printTree(Node*, int)'
undefined reference to delete(Node*, int)' : undefined reference to printAscending(Node*)

everything in the file that i paste code here from

viscid bronze Mar 17, 2024, 2:11 PM

#

(Wrap your message/code with ```code```)

stuck crater Mar 17, 2024, 2:11 PM

#

#include <cstring>
#include "functions.hpp"
#include <iostream>
#include <sstream>
#include <iomanip>
#include <random>

int main(int argc, char* argv[]) {
Node* root = nullptr;
int value;
srand((unsigned) time(NULL));
int i = rand();
char teststring[] = "add";
while (true){
if (argc > 1) {
if (std::strcmp(argv[i], "add" + value))
{
root = insert(root, value);
}
else if (std::strcmp(argv[i], "graph"))
{
printTree(root, 0);
}
else if (std::strcmp(argv[i], "remove" + value))
{
root = remove(root, value);
}
else if (std::strcmp(argv[i], "print"))
{
printAscending(root);
}
}
}
return 0;
} ***

#

like this?

snow roostBOT Mar 17, 2024, 2:15 PM

#

How to Format Code on Discord

Markup

```cpp
int main() {}
```

Result

int main() {}

noble ginkgo Mar 17, 2024, 2:15 PM

#

try this

uneven nova Mar 17, 2024, 2:16 PM

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stuck crater like this?

No

stuck crater Mar 17, 2024, 2:16 PM

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3 stars before and after in code you mean?

uneven nova Mar 17, 2024, 2:17 PM

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No

#

Backticks

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` is not a star

stuck crater Mar 17, 2024, 2:17 PM

#

o

#

h

#

#include <cstring>
#include "functions.hpp"
#include <iostream>
#include <sstream>
#include <iomanip>
#include <random>

int main(int argc, char* argv[]) {
    Node* root = nullptr;
    int value;
    srand((unsigned) time(NULL));
    int i = rand();
    char teststring[] = "add";
        while (true){
            if (argc > 1) {
                if (std::strcmp(argv[i], "add" + value))
                {
                    root = insert(root, value);
                }
                else if (std::strcmp(argv[i], "graph"))
                {
                    printTree(root, 0);
                }
                else if (std::strcmp(argv[i], "remove" + value))
                {
                    root = remove(root, value);
                }
                else if (std::strcmp(argv[i], "print"))
                {
                    printAscending(root);
                }
            }
        }
    return 0;
}```

noble ginkgo Mar 17, 2024, 2:18 PM

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and then, in front of first 3 backticks, write extension of language of your choice. in this case, cpp would be it

noble ginkgo Mar 17, 2024, 2:18 PM

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snow roost

like this

stuck crater Mar 17, 2024, 2:19 PM

#

um

uneven nova Mar 17, 2024, 2:19 PM

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You can edit previous messages instead of posting a new one

uneven nova Mar 17, 2024, 2:20 PM

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stuck crater um

```cpp

noble ginkgo Mar 17, 2024, 2:20 PM

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there you go

stuck crater Mar 17, 2024, 2:20 PM

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;d

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i didn't post here the file with these functions defined because i don't think it would make sense

uneven nova Mar 17, 2024, 2:23 PM

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stuck crater Hello, can someone look at this main function and tell if there's really an "und...

Don’t think you need both a pragma once guard and the ifndef guard

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remove pragma once

stuck crater Mar 17, 2024, 2:23 PM

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being honest it's the first time I'm using it

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don't know much about it

uneven nova Mar 17, 2024, 2:24 PM

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#pragma once is non-standard

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I tend to stay away from it

stuck crater Mar 17, 2024, 2:24 PM

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good to know

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by the way, I'm also a fan of DB ;d

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do you have an idea what I can chcange to don't have this error?

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i meand undefined reference

faint lily Mar 17, 2024, 2:28 PM

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uneven nova #pragma once is non-standard

it's implemented by an absurdly high number of compilers, so we don't usually care

uneven nova Mar 17, 2024, 2:28 PM

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I just said my reason why

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Didn’t say it was a terrible thing

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I’m assuming you’ve defined those functions in functions.cpp

stuck crater Mar 17, 2024, 2:30 PM

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yep

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exactly

uneven nova Mar 17, 2024, 2:30 PM

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how are you compiling

stuck crater Mar 17, 2024, 2:31 PM

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cmd

uneven nova Mar 17, 2024, 2:31 PM

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and what command(s) are you typing

stuck crater Mar 17, 2024, 2:31 PM

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g++ Source1.cpp

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Source1 is the name of file with main

uneven nova Mar 17, 2024, 2:32 PM

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try g++ Source1.cpp functions.cpp

stuck crater Mar 17, 2024, 2:35 PM

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error: multiple definition of 'enum Color'

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because it is in header file and in the functions file

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i quess

uneven nova Mar 17, 2024, 2:36 PM

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What happens if you comment out the one in the functions.cpp file

stuck crater Mar 17, 2024, 2:37 PM

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wow

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it has compiled

uneven nova Mar 17, 2024, 2:38 PM

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perfect timing, I have to go

stuck crater Mar 17, 2024, 2:39 PM

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thank you a lot

#undefined reference to