Eroare de compilare: user.c: In function ‘cmmdc’: user.c:9:9: warning: implicit declaration of function ‘euclid_gcd_recur’ [-Wimplicit-function-declaration] return euclid_gcd_recur(b, a % b);} ^ user.c: In function ‘main’: user.c:25:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&n); ^ user.c:28:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d",&a,&b); ^ /tmp/cci9ZX9F.o: In function `cmmdc': user.c:(.text+0x1c): undefined reference to `euclid_gcd_recur' /tmp/cci9ZX9F.o: In function `main': user.c:(.text.startup+0xd0): undefined reference to `euclid_gcd_recur' collect2: error: ld returned 1 exit status