Compilare: user.c: In function ‘main’: user.c:19:2: warning: implicit declaration of function ‘strtok_r’ [-Wimplicit-function-declaration] token = strtok_r(text, "}", &end_token); ^ user.c:19:8: warning: assignment makes pointer from integer without a cast [enabled by default] token = strtok_r(text, "}", &end_token); ^ user.c:22:15: warning: assignment makes pointer from integer without a cast [enabled by default] tokenPuncte = strtok_r(auxPuncte, ":", &end_Puncte); ^ user.c:25:16: warning: assignment makes pointer from integer without a cast [enabled by default] tokenPuncte = strtok_r(0, ":", &end_Puncte); ^ user.c:29:9: warning: assignment makes pointer from integer without a cast [enabled by default] token = strtok_r(0, "}", &end_token); ^ user.c:6:9: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("convertor.in", "r", stdin); ^ /tmp/ccjJyJXP.o: In function `main': user.c:(.text.startup+0x68): warning: the `gets' function is dangerous and should not be used.