Thread: Cannot resolve a compile error with GCC compiler in Fedora

Hi guys

I have been trying to get this code running using GCC compiler in Fedora . I get an error while compiling which I am not able to resolve. Can someone help me out to fix this error?

Code:

//This program calculates the cosine of different angles.

#include<stdio.h>
#include<math.h>

#define PI 3.1416
#define MAX 180

main()
        {
         int angle;
         float x;
         float y;
         angle=0;
         printf("Angle  Cos(angle)\n\n");

         while(angle<=MAX)
              { x=(PI/MAX)*angle;
                y=cos(x);
                printf("%15d    %13.4f\n",angle,y);
                angle=angle+10;
              }
        }

[anishjp@anish C_programs]$ gcc cosine_function.c -o cosine_function
/tmp/ccITJ2Tu.o: In function `main':
cosine_function.c: (.text+0x37): undefined reference to `cos'
collect2: ld returned 1 exit status

Any help would be much appreciated!

Regards,
Anish

Also, for future reference, that's not really a compiler error, it's a linker error. You might want to read this.

Thanks very much for helping me, I appreciate it much!

Originally Posted by Salem

You need to link with the math library

gcc cosine_function.c -o cosine_function -lm

It worked!