Problems in linking a subroutine to main file

Question

I am having difficulties while trying to link a file to my main code in order to interpolate a polynomial I have written minimal code and I have all the files used in the interpolation under the same directory. The files are from the book Numerical Recipes. I have minimal experience in linking external libraries and using subroutines in C. I would be glad if you can provide some assistance. The code and the associated files are as follows: nrutil.c ; nrutil.h; POLINT.C

#include <stdio.h>
#include <math.h>
#include <limits.h>
#include <stdlib.h>
#include <POLINT.C>
int main()
{
    int i;
    long double x[11], erf[11];
    for(i = 0; i <11; i++)
    {
        x[i] = i / 10.0;
        erf[i] = erfl(x[i]);
        printf("x is %Lf \n", x[i]);
    }


    return 0;
}

You are including a ".c" file? Is there an associated header and compiled library? — Duck, Nov 29 '13 at 16:42
You should find this link useful. http://stackoverflow.com/questions/15622409/how-to-link-multiple-implementation-files-in-c — KeithSmith, Nov 29 '13 at 17:10

score 1 · Accepted Answer · answered Nov 29 '13 at 16:58

1

Try:

Do not include POLINT.C

If you really have to compile everything all at once:

gcc POLINT.C nrutil.c -o nrutil -lm

answered Nov 29 '13 at 16:58

jim mcnamara

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Thanks I think that sort of worked out actually I copied and pasted part of the code to my main file and put an header as nrutil.h inside it and compiled it along with nrutil.c – Vesnog Nov 29 '13 at 19:25

Problems in linking a subroutine to main file

1 Answers1