Undefined reference?

Asked Dec 13 '22 at 20:54

Active Dec 13 '22 at 20:54

Viewed 21 times

A simple program but for some reason it can't run

#include <stdio.h>
#include <stdlib.h>
#include "simpio.h"
int main()
{
float kop;
kop = GetReal();
printf("%d",kop);
    return 0;
}

it says undefined reference to 'GetReal' and 'getInteger' and the other

the compiler I guess is not in the right place

asked Dec 13 '22 at 20:54

Panayiotis

1

can you point where GetReal is defined? – Iłya Bursov Dec 13 '22 at 20:56
1

That's a linker error — it means you've not included the library (or object file(s)) that define `GetReal()` on the command line that links the program. Including the header declares the existence of the function to the compiler. But the linker needs to know where the functions are defined. – Jonathan Leffler Dec 13 '22 at 20:59
Once you have fixed that part, switch from `printf("%d",kop);` to `printf("%f",kop);` – David Ranieri Dec 13 '22 at 21:01
@IłyaBursov It's presumably in the library that corresponds to `simpio.h` – Barmar Dec 13 '22 at 21:02
the library is linked correctly – Panayiotis Dec 13 '22 at 21:07

0 Answers0