Compilare: user.c: In function ‘main’: user.c:30:2: warning: implicit declaration of function ‘strtok_r’ [-Wimplicit-function-declaration] p2 = strtok_r (copyp, ",", tok3); ^ user.c:30:5: warning: assignment makes pointer from integer without a cast [enabled by default] p2 = strtok_r (copyp, ",", tok3); ^ user.c:40:6: warning: assignment makes pointer from integer without a cast [enabled by default] p2 = strtok_r (NULL, ",", tok3); ^ user.c:8:9: warning: unused variable ‘ok’ [-Wunused-variable] int i, ok; ^ user.c:7:36: warning: unused variable ‘tok2’ [-Wunused-variable] char *p, *p1, *p2, *p3, **tok1, **tok2, **tok3, *copyp; ^ user.c:7:28: warning: unused variable ‘tok1’ [-Wunused-variable] char *p, *p1, *p2, *p3, **tok1, **tok2, **tok3, *copyp; ^ user.c:25:8: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] fread (wholefile, sizeof(char),filedim, f); ^